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
7976513Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
25857369173674589991961.2old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-07-30_p95holder_B1EEB1938E0E639F139989053
Verified2019-12-17lobsterfordinnerB1EEB1938E0E639F175321753
History
DateUserTypeResult
2024-02-13Stef42NF-PM1
B1=859000, B2=1420146000
2019-12-17lobsterfordinnerC-PRP
M7976513/2585736917367458999 : B1EEB1938E0E639F
PRP: Verified
PRP without proof (not generated)
2018-07-30_p95holder_C-PRP
M7976513/2585736917367458999 : B1EEB1938E0E639F
PRP: Verified
PRP without proof (not generated)