RSA numbers
In mathematics, the RSA numbers are a set of large semiprimes that are part of the RSA Factoring Challenge. The challenge was to find the prime factors but it was declared inactive in 2007. It was created by RSA Laboratories in March 1991 to encourage research into computational number theory and the practical difficulty of factoring large integers.
RSA Laboratories published a number of semiprimes with 100 to 617 decimal digits. Cash prizes of varying size, up to US$200,000 were offered for factorization of some of them. The smallest RSA number was factored in a few days. Most of the numbers have still not been factored and many of them are expected to remain unfactored for many years to come., the smallest 23 of the 54 listed numbers have been factored.
The RSA challenge officially ended in 2007 but people are still attempting to find the factorizations. According to RSA Laboratories, "Now that the industry has a considerably more advanced understanding of the cryptanalytic strength of common symmetric-key and public-key algorithms, these challenges are no longer active." Some of the smaller prizes had been awarded at the time. The remaining prizes were retracted.
The first RSA numbers generated, from RSA-100 to RSA-500, were labeled according to their number of decimal digits. Later, beginning with RSA-576, binary digits are counted instead. An exception to this is RSA-617, which was created before the change in the numbering scheme. The numbers are listed in increasing order below.
RSA-100
RSA-100 has 100 decimal digits. Its factorization was announced on April 1, 1991 by Arjen K. Lenstra. Reportedly, the factorization took a few days using the multiple-polynomial quadratic sieve algorithm on a MasPar parallel computer.The value and factorization of RSA-100 are as follows:
RSA-100 = 1522605027922533360535618378132637429718068114961380688657908494580122963258
952897654000350692006139
RSA-100 = 37975227936943673922808872755445627854565536638199
× 40094690950920881030683735292761468389214899724061
It takes four hours to repeat this factorization using the program on a 2200 MHz Athlon 64 processor.
The number can be factorized in 72 minutes on overclocked to 3.5 GHz Intel Core2 Quad q9300, using and binaries running by .
RSA-110
RSA-110 has 110 decimal digits, and was factored in April 1992 by Arjen K. Lenstra and Mark S. Manasse in approximately one month.The number can be factorized in less than four hours on overclocked to 3.5 GHz Intel Core2 Quad q9300, using and binaries running by .
The value and factorization are as follows:
RSA-110 = 3579423417972586877499180783256845540300377802422822619353290819048467025236
4677411513516111204504060317568667
RSA-110 = 6122421090493547576937037317561418841225758554253106999
× 5846418214406154678836553182979162384198610505601062333
RSA-120
RSA-120 has 120 decimal digits, and was factored in June 1993 by Thomas Denny, Bruce Dodson, Arjen K. Lenstra, and Mark S. Manasse. The computation took under three months of actual computer time.The value and factorization are as follows:
RSA-120 = 2270104812954373633342599609474936688958753364660847800381732582470091626757
79735389791151574049166747880487470296548479
RSA-120 = 327414555693498015751146303749141488063642403240171463406883
× 693342667110830181197325401899700641361965863127336680673013
RSA-129
RSA-129, having 129 decimal digits, was not part of the 1991 RSA Factoring Challenge, but rather related to Martin Gardner's Mathematical Games column in the August 1977 issue of Scientific American.RSA-129 was factored in April 1994 by a team led by Derek Atkins, Michael Graff, Arjen K. Lenstra and Paul Leyland, using approximately 1600 computers from around 600 volunteers connected over the Internet. A US$100 token prize was awarded by RSA Security for the factorization, which was donated to the Free Software Foundation.
The value and factorization are as follows:
RSA-129 = 1143816257578888676692357799761466120102182967212423625625618429357069352457
33897830597123563958705058989075147599290026879543541
RSA-129 = 3490529510847650949147849619903898133417764638493387843990820577
× 32769132993266709549961988190834461413177642967992942539798288533
The factorization was found using the Multiple Polynomial Quadratic Sieve algorithm.
The factoring challenge included a message encrypted with RSA-129. When decrypted using the factorization the message was revealed to be "The Magic Words are Squeamish Ossifrage".
RSA-130
RSA-130 has 130 decimal digits, and was factored on April 10, 1996 by a team led by Arjen K. Lenstra and composed of Jim Cowie, Marije Elkenbracht-Huizing, Wojtek Furmanski, Peter L. Montgomery, Damian Weber and Joerg Zayer.The value and factorization are as follows:
RSA-130 = 1807082088687404805951656164405905566278102516769401349170127021450056662540
244048387341127590812303371781887966563182013214880557
RSA-130 = 39685999459597454290161126162883786067576449112810064832555157243
× 45534498646735972188403686897274408864356301263205069600999044599
The factorization was found using the Number Field Sieve algorithm and the polynomial
5748302248738405200 x5 + 9882261917482286102 x4
- 13392499389128176685 x3 + 16875252458877684989 x2
+ 3759900174855208738 x1 - 46769930553931905995
which has a root of 12574411168418005980468 modulo RSA-130.
RSA-140
RSA-140 has 140 decimal digits, and was factored on February 2, 1999 by a team led by Herman te Riele and composed of Stefania Cavallar, Bruce Dodson, Arjen K. Lenstra, Paul Leyland, Walter Lioen, Peter L. Montgomery, Brian Murphy and Paul Zimmermann.The value and factorization are as follows:
RSA-140 = 2129024631825875754749788201627151749780670396327721627823338321538194998405
6495911366573853021918316783107387995317230889569230873441936471
RSA-140 = 3398717423028438554530123627613875835633986495969597423490929302771479
× 6264200187401285096151654948264442219302037178623509019111660653946049
The factorization was found using the Number Field Sieve algorithm and an estimated 2000 MIPS-years of computing time.
RSA-150
RSA-150 has 150 decimal digits, and was withdrawn from the challenge by RSA Security. RSA-150 was eventually factored into two 75-digit primes by Aoki et al. in 2004 using the general number field sieve, years after bigger RSA numbers that were still part of the challenge had been solved.The value and factorization are as follows:
RSA-150 = 1550898124783484405096067543700118617706545458309954306554669457743126327034
63465954363335027577729025391453996787414027003501631772186840890795964683
RSA-150 = 348009867102283695483970451047593424831012817350385456889559637548278410717
× 445647744903640741533241125787086176005442536297766153493419724532460296199
RSA-155
RSA-155 has 155 decimal digits, and was factored on August 22, 1999 in a span of six months, by a team led by Herman te Riele and composed of Stefania Cavallar, Bruce Dodson, Arjen K. Lenstra, Walter Lioen, Peter L. Montgomery, Brian Murphy, Karen Aardal, Jeff Gilchrist, Gerard Guillerm, Paul Leyland, Joel Marchand, François Morain, Alec Muffett, Craig Putnam, Chris Putnam and Paul Zimmermann.The value and factorization are as follows:
RSA-155 = 1094173864157052742180970732204035761200373294544920599091384213147634998428
8934784717997257891267332497625752899781833797076537244027146743531593354333
897
RSA-155 = 1026395928297411057720541965739916759007165678080380668033419335217907113077
79
× 1066034883801684548209272203600128786792079585759892915222706082371930628086
43
The factorization was found using the general number field sieve algorithm and an estimated 8000 MIPS-years of computing time.
RSA-160
RSA-160 has 160 decimal digits, and was factored on April 1, 2003 by a team from the University of Bonn and the German Federal Office for Information Security. The team contained J. Franke, F. Bahr, T. Kleinjung, M. Lochter, and M. Böhm.The value and factorization are as follows:
RSA-160 = 2152741102718889701896015201312825429257773588845675980170497676778133145218
8591356730110597734910596024979071115852143020793146652028401406199469949275
70407753
RSA-160 = 4542789285848139407168619064973883165613714577846979325095998470925000415733
5359
× 4738809060383201619663383230378895197326892292104095794474135464881202849390
9367
The factorization was found using the general number field sieve algorithm.
RSA-170
RSA-170 has 170 decimal digits and was first factored on December 29, 2009 by D. Bonenberger and M. Krone from Fachhochschule Braunschweig/Wolfenbüttel. An independent factorization was completed by S. A. Danilov and I. A. Popovyan two days later.The value and factorization are as follows:
RSA-170 = 2606262368413984492152987926667443219708592538048640641616478519185999962854
2069361450283931914514618683512198164805919882053057222974116478065095809832
377336510711545759
RSA-170 = 3586420730428501486799804587268520423291459681059978161140231860633948450858
040593963
× 7267029064107019078863797763923946264136137803856996670313708936002281582249
587494493
The factorization was found using the general number field sieve algorithm.
RSA-576
RSA-576 has 174 decimal digits, and was factored on December 3, 2003 by J. Franke and T. Kleinjung from the University of Bonn. A cash prize of $10,000 was offered by RSA Security for a successful factorization.The value and factorization are as follows:
RSA-576 = 1881988129206079638386972394616504398071635633794173827007633564229888597152
3466548531906060650474304531738801130339671619969232120573403187955065699622
1305168759307650257059
RSA-576 = 3980750864240649373971255005503864911990643623425267084063851895759463889572
61768583317
× 4727721461074353025362230719730482246329146953020971164598521711305207112563
63590397527
The factorization was found using the general number field sieve algorithm.
RSA-180
RSA-180 has 180 decimal digits, and was factored on May 8, 2010 by S. A. Danilov and I. A. Popovyan from Moscow State University, Russia.RSA-180 = 1911479277189866096892294666314546498129862462766673548641885036388072607034
3679905877620136513516127813425829612810920004670291298456875280033022177775
2773957404540495707851421041
RSA-180 = 4007800823297508779525813391041005725268293178158071765648821789984975727719
50624613470377
× 4769396887386118369955354773570708579399020760277882320319897758246062255957
73435668861833
The factorization was found using the general number field sieve algorithm implementation running on three Intel Core i7 PCs.
RSA-190
RSA-190 has 190 decimal digits, and was factored on November 8, 2010 by I. A. Popovyan from Moscow State University, Russia and A. Timofeev from CWI, Netherlands.RSA-190 = 1907556405060696491061450432646028861081179759533184460647975622318915025587
1841757540549761551215932934922604641526300932385092466032074171247261215808
58185985938946945490481721756401423481
RSA-190 = 3171195257690152709485171289740475929805147316029450327784761927832793642798
1256542415724309619
× 6015260020444561641587641685526676183243543359471811072599763828083615704046
0481625355619404899
RSA-640
RSA-640 has 193 decimal digits. A cash prize of US$20,000 was offered by RSA Security for a successful factorization. On November 2, 2005, F. Bahr, M. Boehm, J. Franke and T. Kleinjung of the German Federal Office for Information Security announced that they had factorized the number using GNFS as follows:RSA-640 = 3107418240490043721350750035888567930037346022842727545720161948823206440518
0815045563468296717232867824379162728380334154710731085019195485290073377248
22783525742386454014691736602477652346609
RSA-640 = 1634733645809253848443133883865090859841783670033092312181110852389333100104
508151212118167511579
× 1900871281664822113126851573935413975471896789968515493666638539088027103802
104498957191261465571
The computation took five months on 80 2.2 GHz AMD Opteron CPUs.
The slightly larger RSA-200 was factored in May 2005 by the same team.
RSA-200
RSA-200 has 200 decimal digits, and factors into the two 100-digit primes given below.On May 9, 2005, F. Bahr, M. Boehm, J. Franke, and T. Kleinjung announced that they had factorized the number using GNFS as follows:
RSA-200 = 2799783391122132787082946763872260162107044678695542853756000992932612840010
7609345671052955360856061822351910951365788637105954482006576775098580557613
579098734950144178863178946295187237869221823983
RSA-200 = 3532461934402770121272604978198464368671197400197625023649303468776121253679
423200058547956528088349
× 7925869954478333033347085841480059687737975857364219960734330341455767872818
152135381409304740185467
The CPU time spent on finding these factors by a collection of parallel computers amounted - very approximately - to the equivalent of 75 years work for a single 2.2 GHz Opteron-based computer. Note that while this approximation serves to suggest the scale of the effort, it leaves out many complicating factors; the announcement states it more precisely.
RSA-210
RSA-210 has 210 decimal digits and was factored in September 2013 by Ryan Propper:RSA-210 = 2452466449002782119765176635730880184670267876783327597434144517150616008300
3858721695220839933207154910362682719167986407977672324300560059203563124656
1218465817904100131859299619933817012149335034875870551067
RSA-210 = 4359585683259407917999519653872144063854709102652201963187054821445240853452
75999740244625255428455944579
× 5625457617268841037562770073044474817438769440075105451049468510945483965774
79473472146228550799322939273
RSA-704
RSA-704 has 212 decimal digits, and was factored by Shi Bai, Emmanuel Thomé and Paul Zimmermann. The factorization was announced July 2, 2012. A cash prize of US$30,000 was previously offered for a successful factorization.RSA-704 = 7403756347956171282804679609742957314259318888923128908493623263897276503402
8266276891996419625117843995894330502127585370118968098286733173273108930900
552505116877063299072396380786710086096962537934650563796359
RSA-704 = 9091213529597818878440658302600437485892608310328358720428512168960411528640
933367824950788367956756806141
× 8143859259110045265727809126284429335877899002167627883200914172429324360133
004116702003240828777970252499
RSA-220
RSA-220 has 220 decimal digits, and was factored by S. Bai, P. Gaudry, A. Kruppa, E. Thomé and P. Zimmermann. The factorization was announced on May 13, 2016.RSA-220 = 2260138526203405784941654048610197513508038915719776718321197768109445641817
9666766085931213065825772506315628866769704480700018111497118630021124879281
99487482066070131066586646083327982803560379205391980139946496955261
RSA-220 = 6863656412267566274382371499288437800130842239979164844621244993321541061441
4642667938213644208420192054999687
× 3292907439486349812049301549212935291916455196536233952462686051169290349309
4652463337824866390738191765712603
RSA-230
RSA-230 has 230 decimal digits, and was factored by Samuel S. Gross at on August 15, 2018.RSA-230 = 1796949159794106673291612844957324615636756180801260007088891883553172646034
1490933493372247868650755230855864199929221814436684722874052065257937495694
3483892631711525225256544109808191706117425097024407180103648316382885188526
89
RSA-230 = 4528450358010492026612439739120166758911246047493700040073956759261590397250
033699357694507193523000343088601688589
× 3968132623150957588532394439049887341769533966621957829426966084093049516953
598120833228447171744337427374763106901
In 2017, an analysis by a theory group led by Nike Dattani and experimental group led by Xinhua Peng and Jiangfeng Du determined that RSA-230 could be factored by a D-Wave quantum annealer if it had 687.5 MQB or 5.5 billion qubits, much more than the 2048 qubits currently available on the largest quantum annealer built to date. However, in the same paper they note that RSA-230 could simply be factored by minimizing a 5893-variable quartic polynomial that takes in binary input. Therefore a quantum annealer with 5893 qubits that can be coupled together arbitrarily with each qubit coupled simultaneously to at most three other qubits, would be able to factor RSA-230. The amount of time this annealing would take is still an open question.
RSA-232
RSA-232 has 232 decimal digits, and was factored on February 17, 2020 by N. L. Zamarashkin, D. A. Zheltkov and S. A. Matveev.RSA-232 = 1009881397871923546909564894309468582818233821955573955141120516205831021338
5285453743661097571543636649133800849170651699217015247332943892702802343809
6090980497644054071120196541074755382494867277137407501157718230539834060616
2079
RSA-232 = 2966909333208360660361779924242630634742946262521852394401857157419437019472
3262390744910112571804274494074452751891
× 3403816175197563438006609498491521420547121760734723172735163413276050706174
8526506443144325148088881115083863017669
RSA-768
RSA-768 has 232 decimal digits, and was factored on December 12, 2009 over the span of two years, by Thorsten Kleinjung, Kazumaro Aoki, Jens Franke, Arjen K. Lenstra, Emmanuel Thomé, Pierrick Gaudry, Alexander Kruppa, Peter Montgomery, Joppe W. Bos, Dag Arne Osvik, Herman te Riele, Andrey Timofeev, and Paul Zimmermann.RSA-768 = 1230186684530117755130494958384962720772853569595334792197322452151726400507
2636575187452021997864693899564749427740638459251925573263034537315482685079
1702612214291346167042921431160222124047927473779408066535141959745985690214
3413
RSA-768 = 3347807169895689878604416984821269081770479498371376856891243138898288379387
8002287614711652531743087737814467999489
× 3674604366679959042824463379962795263227915816434308764267603228381573966651
1279233373417143396810270092798736308917
The CPU time spent on finding these factors by a collection of parallel computers amounted approximately to the equivalent of almost 2000 years of computing on a single-core 2.2 GHz AMD Opteron-based computer.
RSA-240
RSA-240 has 240 decimal digits, and was factored in November 2019 by Fabrice Boudot, Pierrick Gaudry, Aurore Guillevic, Nadia Heninger, Emmanuel Thomé and Paul Zimmermann.RSA-240 = 1246203667817187840658350446081065904348203746516788057548187888832896668011
8821085503603957027250874750986476843845862105486553797025393057189121768431
8286362846948405301614416430468066875699415246993185704183030512549594371372
159029236099
RSA-240 = 5094359522858399145550510235808437141326483820241114731866602965218212064697
46700620316443478873837606252372049619334517
× 2446242088383181505678131390240028966538020925789314014520412213365584770951
78155258218897735030590669041302045908071447
The CPU time spent on finding these factors amounted to approximately 900 core-years on a 2.1 GHz Intel Xeon Gold 6130 CPU. Compared to the factorization of RSA-768, the authors estimate that better algorithms sped their calculations by a factor of 3–4 and faster computers sped their calculation by a factor of 1.25–1.67.
RSA-250
RSA-250 has 250 decimal digits, and was factored in February 2020 by Fabrice Boudot, Pierrick Gaudry, Aurore Guillevic, Nadia Heninger, Emmanuel Thomé, and Paul Zimmermann.RSA-250 = 2140324650240744961264423072839333563008614715144755017797754920881418023447
1401366433455190958046796109928518724709145876873962619215573630474547705208
0511905649310668769159001975940569345745223058932597669747168173806936489469
9871578494975937497937
RSA-250 = 6413528947707158027879019017057738908482501474294344720811685963202453234463
0238623598752668347708737661925585694639798853367
× 3337202759497815655622601060535511422794076034476755466678452098702384172921
0037080257448673296881877565718986258036932062711
RSA-260
RSA-260 has 260 decimal digits, and has not been factored so far.RSA-260 = 2211282552952966643528108525502623092761208950247001539441374831912882294140
2001986512729726569746599085900330031400051170742204560859276357953757185954
2988389587092292384910067030341246205457845664136645406842143612930176940208
46391065875914794251435144458199
RSA-270
RSA-270 has 270 decimal digits, and has not been factored so far.RSA-270 = 2331085303444075445276376569106805241456198124803054490429486119684959182451
3578286788836931857711641821391926857265831491306067262691135402760979316634
1626693946596196427744273886601876896313468704059066746903123910748277606548
649151920812699309766587514735456594993207
RSA-896
RSA-896 has 270 decimal digits, and has not been factored so far. A cash prize of $75,000 was previously offered for a successful factorization.RSA-896 = 4120234369866595438555313653325759481798116998443279828454556264338764455652
4842619809887042316184187926142024718886949256093177637503342113098239748515
0944909106910269861031862704114880866970564902903653658867433731720813104105
190864254793282601391257624033946373269391
RSA-280
RSA-280 has 280 decimal digits, and has not been factored so far.RSA-280 = 1790707753365795418841729699379193276395981524363782327873718589639655966058
5783742549640396449103593468573113599487089842785784500698716853446786525536
5503525160280656363736307175332772875499505341538927978510751699922197178159
7724733184279534477239566789173532366357270583106789
RSA-290
RSA-290 has 290 decimal digits, and has not been factored so far.RSA-290 = 3050235186294003157769199519894966400298217959748768348671526618673316087694
3419156362946151249328917515864630224371171221716993844781534383325603218163
2549201100649908073932858897185243836002511996505765970769029474322210394327
60575157628357292075495937664206199565578681309135044121854119
RSA-300
RSA-300 has 300 decimal digits, and has not been factored so far.RSA-300 = 2769315567803442139028689061647233092237608363983953254005036722809375824714
9473946190060218756255124317186573105075074546238828817121274630072161346956
4396741836389979086904304472476001839015983033451909174663464663867829125664
459895575157178816900228792711267471958357574416714366499722090015674047
RSA-309
RSA-309 has 309 decimal digits, and has not been factored so far.RSA-309 = 1332943998825757583801437794588036586217112243226684602854588261917276276670
5425540467426933349195015527349334314071822840746357352800368666521274057591
1870128339157499072351179666739658503429931021985160714113146720277365006623
6927218079163559142755190653347914002967258537889160429597714204365647842739
10949
RSA-1024
RSA-1024 has 309 decimal digits, and has not been factored so far. $100,000 was previously offered for factorization.RSA-1024 = 135066410865995223349603216278805969938881475605667027524485143851526510604
859533833940287150571909441798207282164471551373680419703964191743046496589
274256239341020864383202110372958725762358509643110564073501508187510676594
629205563685529475213500852879416377328533906109750544334999811150056977236
890927563
RSA-310
RSA-310 has 310 decimal digits, and has not been factored so far.RSA-310 = 1848210397825850670380148517702559371400899745254512521925707445580334710601
4125276757082979328578439013881047668984294331264191394626965245834649837246
5163148188847336415136873623631778358751846501708714541673402642461569061162
0116380982484120857688483676576094865930188367141388795454378671343386258291
687641
RSA-320
RSA-320 has 320 decimal digits, and has not been factored so far.RSA-320 = 2136810696410071796012087414500377295863767938372793352315068620363196552357
8837094085435000951700943373838321997220564166302488321590128061531285010636
8571638978998117122840139210685346167726847173232244364004850978371121744321
8270343654835754061017503137136489303437996367224915212044704472299799616089
2591129924218437
RSA-330
RSA-330 has 330 decimal digits, and has not been factored so far.RSA-330 = 1218708633106058693138173980143325249157710686226055220408666600017481383238
1352456802425903555880722805261111079089882303717632638856140900933377863089
0634828167900405006112727432172179976427017137792606951424995281839383708354
6364684839261149319768449396541020909665209789862312609604983709923779304217
01862444655244698696759267
RSA-340
RSA-340 has 340 decimal digits, and has not been factored so far.RSA-340 = 2690987062294695111996484658008361875931308730357496490239672429933215694995
2758588771223263308836649715112756731997946779608413232406934433532048898585
9176676580752231563884394807622076177586625973975236127522811136600110415063
0004691128152106812042872285697735145105026966830649540003659922618399694276
990464815739966698956947129133275233
RSA-350
RSA-350 has 350 decimal digits, and has not been factored so far.RSA-350 = 2650719995173539473449812097373681101529786464211583162467454548229344585504
3495841191504413349124560193160478146528433707807716865391982823061751419151
6068496555750496764686447379170711424873128631468168019548127029171231892127
2886825928263239383444398948209649800021987837742009498347263667908976501360
3382322972552204068806061829535529820731640151
RSA-360
RSA-360 has 360 decimal digits, and has not been factored so far.RSA-360 = 2186820202343172631466406372285792654649158564828384065217121866374227745448
7764963889680817334211643637752157994969516984539482486678141304751672197524
0052350576247238785129338002757406892629970748212734663781952170745916609168
9358372359962787832802257421757011302526265184263565623426823456522539874717
61591019113926725623095606566457918240614767013806590649
RSA-370
RSA-370 has 370 decimal digits, and has not been factored so far.RSA-370 = 1888287707234383972842703127997127272470910519387718062380985523004987076701
7212819937261952549039800018961122586712624661442288502745681454363170484690
7379449525034797494321694352146271320296579623726631094822493455672541491544
2700993152879235272779266578292207161032746297546080025793864030543617862620
878802244305286292772467355603044265985905970622730682658082529621
RSA-380
RSA-380 has 380 decimal digits, and has not been factored so far.RSA-380 = 3013500443120211600356586024101276992492167997795839203528363236610578565791
8270750937407901898070219843622821090980641477056850056514799336625349678549
2187941807116344787358312651772858878058620717489800725333606564197363165358
2237779263423501952646847579678711825720733732734169866406145425286581665755
6977260763553328252421574633011335112031733393397168350585519524478541747311
RSA-390
RSA-390 has 390 decimal digits, and has not been factored so far.RSA-390 = 2680401941182388454501037079346656065366941749082852678729822424397709178250
4623002472848967604282562331676313645413672467684996118812899734451228212989
1630084759485063423604911639099585186833094019957687550377834977803400653628
6955344904367437281870253414058414063152368812498486005056223028285341898040
0795447435865033046248751475297412398697088084321037176392288312785544402209
1083492089
RSA-400
RSA-400 has 400 decimal digits, and has not been factored so far.RSA-400 = 2014096878945207511726700485783442547915321782072704356103039129009966793396
1419850865094551022604032086955587930913903404388675137661234189428453016032
6191193056768564862615321256630010268346471747836597131398943140685464051631
7519403149294308737302321684840956395183222117468443578509847947119995373645
3607109795994713287610750434646825511120586422993705980787028106033008907158
74500584758146849481
RSA-410
RSA-410 has 410 decimal digits, and has not been factored so far.RSA-410 = 1965360147993876141423945274178745707926269294439880746827971120992517421770
1079138139324539033381077755540830342989643633394137538983355218902490897764
4412968474332754608531823550599154905901691559098706892516477785203855688127
0635069372091564594333528156501293924133186705141485137856845741766150159437
6063244163040088180887087028771717321932252992567756075264441680858665410918
431223215368025334985424358839
RSA-420
RSA-420 has 420 decimal digits, and has not been factored so far.RSA-420 = 2091366302476510731652556423163330737009653626605245054798522959941292730258
1898373570076188752609749648953525484925466394800509169219344906273145413634
2427186266197097846022969248579454916155633686388106962365337549155747268356
4666583846809964354191550136023170105917441056517493690125545320242581503730
3405952887826925813912683942756431114820292313193705352716165790132673270514
3817744164107601735413785886836578207979
RSA-430
RSA-430 has 430 decimal digits, and has not been factored so far.RSA-430 = 3534635645620271361541209209607897224734887106182307093292005188843884213420
6950355315163258889704268733101305820000124678051064321160104990089741386777
2424190744453885127173046498565488221441242210687945185565975582458031351338
2070785777831859308900851761495284515874808406228585310317964648830289141496
3289966226854692560410075067278840383808716608668377947047236323168904650235
70092246473915442026549955865931709542468648109541
RSA-440
RSA-440 has 440 decimal digits, and has not been factored so far.RSA-440 = 2601428211955602590070788487371320550539810804595235289423508589663391270837
4310252674800592426746319007978890065337573160541942868114065643853327229484
5029942332226171123926606357523257736893667452341192247905168387893684524818
0307729497304959710847337973805145673263119916483529703607405432752966630781
2234597766390750441445314408171802070904072739275930410299359006059619305590
701939627725296116299946059898442103959412221518213407370491
RSA-450
RSA-450 has 450 decimal digits, and has not been factored so far.RSA-450 = 1984634237142836623497230721861131427789462869258862089878538009871598692569
0078791591684242367262529704652673686711493985446003494265587358393155378115
8032447061155145160770580926824366573211993981662614635734812647448360573856
3132247491715526997278115514905618953253443957435881503593414842367096046182
7643434794849824315251510662855699269624207451365738384255497823390996283918
3287667419172988072221996532403300258906083211160744508191024837057033
RSA-460
RSA-460 has 460 decimal digits, and has not been factored so far.RSA-460 = 1786856020404004433262103789212844585886400086993882955081051578507634807524
1464078819812169681394445771476334608488687746254318292828603396149562623036
3564554675355258128655971003201417831521222464468666642766044146641933788836
8932452217321354860484353296131403821175862890998598653858373835628654351880
4806362231643082386848731052350115776715521149453708868428108303016983133390
0416365515466857004900847501644808076825638918266848964153626486460448430073
4909
RSA-1536
RSA-1536 has 463 decimal digits, and has not been factored so far. $150,000 was previously offered for successful factorization.RSA-1536 = 184769970321174147430683562020016440301854933866341017147178577491065169671
116124985933768430543574458561606154457179405222971773252466096064694607124
962372044202226975675668737842756238950876467844093328515749657884341508847
552829818672645133986336493190808467199043187438128336350279547028265329780
293491615581188104984490831954500984839377522725705257859194499387007369575
568843693381277961308923039256969525326162082367649031603655137144791393234
7169566988069
RSA-470
RSA-470 has 470 decimal digits, and has not been factored so far.RSA-470 = 1705147378468118520908159923888702802518325585214915968358891836980967539803
6897711442383602526314519192366612270595815510311970886116763177669964411814
0957486602388713064698304619191359016382379244440741228665455229545368837485
5874455212895044521809620818878887632439504936237680657994105330538621759598
4047709603954312447692725276887594590658792939924609261264788572032212334726
8553025718835659126454325220771380103576695555550710440908570895393205649635
76770285413369
RSA-480
RSA-480 has 480 decimal digits, and has not been factored so far.RSA-480 = 3026570752950908697397302503155918035891122835769398583955296326343059761445
7144169659817040125185215913853345598217234371231338324773210726853524776378
4105186549246199888070331088462855743520880671299302895546822695492968577380
7067958428022008294111984222973260208233693152589211629901686973933487362360
8129660418514569063995282978176790149760521395548532814196534676974259747930
6858645849268328985687423881853632604706175564461719396117318298679820785491
875674946700413680932103
RSA-490
RSA-490 has 490 decimal digits, and has not been factored so far.RSA-490 = 1860239127076846517198369354026076875269515930592839150201028353837031025971
3738522164743327949206433999068225531855072554606782138800841162866037393324
6578171804201717222449954030315293547871401362961501065002486552688663415745
9758925793594165651020789220067311416926076949777767604906107061937873540601
5942747316176193775374190713071154900658503269465516496828568654377183190586
9537640698044932638893492457914750855858980849190488385315076922453755527481
1376719096144119390052199027715691
RSA-500
RSA-500 has 500 decimal digits and has not been factored so far.RSA-500 = 1897194133748626656330534743317202527237183591953428303184581123062450458870
7687605943212347625766427494554764419515427586743205659317254669946604982419
7301601038125215285400688031516401611623963128370629793265939405081077581694
4786041721411024641038040278701109808664214800025560454687625137745393418221
5494821277335671735153472656328448001134940926442438440198910908603252678814
7850601132077287172819942445113232019492229554237898606631074891074722425617
39680319169243814676235712934292299974411361
RSA-617
RSA-617 has 617 decimal digits and has not been factored so far.RSA-617 = 2270180129378501419358040512020458674106123596276658390709402187921517148311
9139894870133091111044901683400949483846818299518041763507948922590774925466
0881718792594659210265970467004498198990968620394600177430944738110569912941
2854289188085536270740767072259373777266697344097736124333639730805176309150
6836310795312607239520365290032105848839507981452307299417185715796297454995
0235053160409198591937180233074148804462179228008317660409386563445710347785
5345712108053073639453592393265186603051504106096643731332367283153932350006
7937107541955437362433248361242525945868802353916766181532375855504886901432
221349733
RSA-2048
RSA-2048 has 617 decimal digits. It is the largest of the RSA numbers and carried the largest cash prize for its factorization, $200,000. The RSA-2048 may not be factorizable for many years to come, unless considerable advances are made in integer factorization or computational power in the near future.RSA-2048 = 2519590847565789349402718324004839857142928212620403202777713783604366202070
7595556264018525880784406918290641249515082189298559149176184502808489120072
8449926873928072877767359714183472702618963750149718246911650776133798590957
0009733045974880842840179742910064245869181719511874612151517265463228221686
9987549182422433637259085141865462043576798423387184774447920739934236584823
8242811981638150106748104516603773060562016196762561338441436038339044149526
3443219011465754445417842402092461651572335077870774981712577246796292638635
6373289912154831438167899885040445364023527381951378636564391212010397122822
120720357