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

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Exponent Range:










MnStatusDetails
7631251Factored
FactorDigitsBitsDate
192409105601739943757020403198528500796940130.52023-02-17 14:43:34
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-07-26Stephen Wood10887A65A4CE55AA4636177
Verified (Factored)2002-12-09Paul Hoch10887A65A4CE55AA861382
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2023-02-23g0b1B262A35FA20142C1303534753
P-1 factors
DateFactorB1B2
2023-02-17192409105601739943757020403198528500796930000009477604500
History
DateUserTypeResult
2023-02-23daekazCERT
PRP Certification
Proof certified good
2023-02-23g0bC-PRP
M7631251/1924091056017399437570204031985285007969 : 1B262A35FA20142C
PRP proof power = 8
PRP: Verified
Proof certified good
2023-02-17DRobinsonPEF-PM1
Factor: 1924091056017399437570204031985285007969 / (P-1, B1=3000000, B2=9477604500)
2021-04-21-Anonymous-NF
no factor from 2^72 to 2^73
2021-04-21-Anonymous-NF
no factor from 2^71 to 2^72
2021-04-07-Anonymous-NF
no factor from 2^70 to 2^71
2021-04-07-Anonymous-NF
no factor from 2^69 to 2^70
2020-03-06TJAOINF
no factor from 2^68 to 2^69
2018-07-31ramgeisNF
no factor from 2^67 to 2^68
2016-09-14Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-09VictordeHollanderNF
no factor from 2^65 to 2^66
2013-12-04David CampeauNF
no factor from 2^64 to 2^65
2013-10-11NesowaNF
no factor from 2^63 to 2^64
2011-04-16James HeinrichNF-PM1
B1=145000, B2=3190000, E=6