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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MnStatusDetails
12415643Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
37563247894201119671961.7old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-03-26MarkSEA44FC0DB90427CB1490182053
History
DateUserTypeResult
2022-03-26lajo321CERT
PRP Certification
Proof certified good
2022-03-26MarkSC-PRP
M12415643/3756324789420111967 : EA44FC0DB90427CB
PRP proof power = 8
PRP: Verified
Proof certified good
2022-03-21nordiNF-PM1
B1=400000, B2=266243250
2022-03-12nordiNF-PM1
B1=400000