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

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Exponent Range:










MnStatusDetails
848387Factored
FactorDigitsBitsDate
1176160667774494125986170940874225735113.22014-08-10 14:52:03
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski2ED20
Verified (Factored)Paul Victor Novarese8688DF40F5B26ED20
Verified (Factored)Joe Decker8688DF40F5B26ED20
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-28Oliver Kruse8C9A285E0015CEFF1013
Verified2017-10-14Oliver Kruse8C9A285E0015CEFF182467413
Verified2017-12-18ATH8C9A285E0015CEFF156666313
Unverified (Reliable)2020-04-21Oliver Kruse0C67265C79B67F__126448153
P-1 factors
DateFactorB1B2
2014-08-101176160667774494125986170940874225711432362525888652
History
DateUserTypeResult
2020-04-21Oliver KruseC-PRP
M848387/11761606677744941259861709408742257 : 0C67265C79B67F__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-12-18ATHC-PRP
M848387/11761606677744941259861709408742257 : 8C9A285E0015CEFF
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-14Oliver KruseC-PRP
M848387/11761606677744941259861709408742257 : 8C9A285E0015CEFF
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M848387/11761606677744941259861709408742257 : 8C9A285E0015CEFF
PRP: Unverified (Reliable)
PRP without proof (not generated)
2014-08-10mikrF-PM1
Factor: 11761606677744941259861709408742257 / (P-1, B1=11432362, B2=525888652, E=12)
2013-10-28David CampeauNF-PM1
B1=1250000, B2=40000000, E=12
2012-03-20JossNF-PM1
B1=1233491
2010-05-27Architects CubedNF
no factor from 2^60 to 2^61
2009-08-30Carsten KossendeyNF-PM1
B1=848387
2008-10-18Sturle SundeNF
no factor from 2^59 to 2^60
2008-10-18Sturle SundeNF
no factor from 2^58 to 2^59