Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
15004859Factored
FactorDigitsBitsDate
307737185239887974355912374.72022-02-04 01:20:44
ECM
DigitsB1Curves
255000014 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2002-09-14John CullotyCE3F4D467334293C11816398
Verified (Factored)2005-09-03Marc Getty / Phil FizurCE3F4D467334293C52985
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-05-08Perig2ED9D5BFFF6DCD4411007971753
History
DateUserTypeResult
2023-05-09LOBESCERT
PRP Certification
Proof certified good
2023-05-08PerigC-PRP
M15004859/30773718523988797435591 : 2ED9D5BFFF6DCD44
PRP proof power = 8
PRP: Verified
Proof certified good
2023-04-28JacobZNF-PM1
B1=558000, B2=519950970
2022-02-04ATHF-PP1
Start=2/7, B1=1000000, B2=28000000, Factor: 30773718523988797435591
2022-01-26LaurVNF
no factor from 2^72 to 2^73
2021-10-09-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-02SRBaseNF
no factor from 2^70 to 2^71
2020-05-31YxinityNF
no factor from 2^69 to 2^70
2017-09-30ramgeisNF
no factor from 2^68 to 2^69
2015-10-09mikrNF
no factor from 2^67 to 2^68
2014-06-11NesowaNF
no factor from 2^66 to 2^67
2014-06-11NesowaNF
no factor from 2^65 to 2^66