Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2791631Factored
FactorDigitsBitsDate
28809631931031.4old
1230985545914091546.82014-02-20 11:23:01
14249055233376411650.32014-05-26 12:43:27
14715115042461327144232270.32018-04-28 04:57:39
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-21Oliver KruseB70A23E13BD99724392673453
Verified (Factored)2017-12-06kkmrkkblmbrbkB70A23E13BD997243161065453
Verified2018-04-30KingB70A23E13BD997244276644453
History
DateUserTypeResult
2023-01-19USAFSSNF-PM1
B1=212000, B2=148045590
2018-05-08Ducho_YYZNF
no factor from 2^69 to 2^70
2018-05-08Ducho_YYZNF
no factor from 2^68 to 2^69
2018-05-08Ducho_YYZNF
no factor from 2^67 to 2^68
2018-05-08Ducho_YYZNF
no factor from 2^66 to 2^67
2018-05-08Ducho_YYZNF
no factor from 2^65 to 2^66
2018-05-08Ducho_YYZNF
no factor from 2^64 to 2^65
2018-05-08Ducho_YYZNF
no factor from 2^63 to 2^64
2018-05-08Ducho_YYZNF
no factor from 2^62 to 2^63
2018-05-08Ducho_YYZNF
no factor from 2^61 to 2^62
2018-04-30KingC-PRP
M2791631/2880963193/123098554591409/1424905523337641/1471511504246132714423 : B70A23E13BD99724
PRP: Verified
PRP without proof (not generated)
2018-04-28Ducho_YYZF-ECM
Factor: 1471511504246132714423 / (ECM curve 3, B1=50000, B2=5000000)
2017-12-06kkmrkkblmbrbkC-PRP
M2791631/2880963193/123098554591409/1424905523337641 : B70A23E13BD99724
PRP: Verified
PRP without proof (not generated)
2017-10-21Oliver KruseC-PRP
M2791631/2880963193/123098554591409/1424905523337641 : B70A23E13BD99724
PRP: Verified
PRP without proof (not generated)
2014-05-26TJAOIF
Factor: 1424905523337641
2014-02-20TJAOIF
Factor: 123098554591409