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
15463649Factored
FactorDigitsBitsDate
7404086204306939466172169.32016-12-14 16:11:39
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Bad2002-05-11David Auclair7AD3DA8E04045F07876913
Verified (Factored)2004-10-03Chris HalsallB1665C2A6AD504546340339
Verified (Factored)2006-02-15Marc Getty / Phil FizurB1665C2A6AD504547926477
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-08-05Perig0E76A98E0F6C26561416243853
History
DateUserTypeResult
2023-11-05nordiNF-PM1
B1=496000, B2=530595450
2023-10-23nordiNF-PM1
B1=496000
2023-08-05Ivan ZezulaCERT
PRP Certification
Proof certified good
2023-08-05PerigC-PRP
M15463649/740408620430693946617 : 0E76A98E0F6C2656
PRP proof power = 8
PRP: Verified
Proof certified good
2016-12-14ATHF-ECM
Factor: 740408620430693946617 / (ECM curve 1, B1=50000, B2=5000000)
2016-03-16Mark RoseNF
no factor from 2^65 to 2^66
2014-02-23NesowaNF
no factor from 2^66 to 2^67