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
7978961Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
46833353787823477191962.0old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-06-26_p95holder_4D893F55E17FA7B6194210053
Verified2019-12-19Luigi Morelli4D893F55E17FA7B61344102853
History
DateUserTypeResult
2024-02-14Stef42NF-PM1
B1=859000, B2=1420146000
2019-12-19Luigi MorelliC-PRP
M7978961/4683335378782347719 : 4D893F55E17FA7B6
PRP: Verified
PRP without proof (not generated)
2018-06-26_p95holder_C-PRP
M7978961/4683335378782347719 : 4D893F55E17FA7B6
PRP: Verified
PRP without proof (not generated)