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

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MnStatusDetails
11928589Factored
FactorDigitsBitsDate
31960146357386278427090845099488819612960742137.92021-07-15 12:59:19
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2002-01-15Fumitaka HayashiBA17E3B27415003411718069
Verified (Factored)2004-06-12Randal MasutaniBA17E3B2741500345733176
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-12-04LaurV2C383719ACCBB82A1942553153
P-1 factors
DateFactorB1B2
2021-07-153196014635738627842709084509948881961296076189107185673210
History
DateUserTypeResult
2021-12-04Ben DeloCERT
PRP Certification
Proof certified good
2021-12-04LaurVC-PRP
M11928589/319601463573862784270908450994888196129607 : 2C383719ACCBB82A
PRP proof power = 8
PRP: Verified
Proof certified good
2021-07-15LaurVF-PM1
Factor: 319601463573862784270908450994888196129607 / (P-1, B1=6189107, B2=185673210)
2021-05-17lycornNF
no factor from 2^69 to 2^70
2019-04-16riccardo ubertiNF-PM1
B1=430000, B2=8500000, E=12
2018-01-01ramgeisNF
no factor from 2^68 to 2^69
2018-01-01ramgeisNF
no factor from 2^67 to 2^68
2016-03-05YxinityNF
no factor from 2^66 to 2^67
2013-10-20NesowaNF
no factor from 2^65 to 2^66
2013-10-12lycornNF
no factor from 2^64 to 2^65