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
7981327Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
5269122036452411548.9old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-06-28_p95holder_5B2A7A02DE6924D01559951153
Verified2019-12-19lobsterfordinner5B2A7A02DE6924D01533929653
History
DateUserTypeResult
2024-02-14Stef42NF-PM1
B1=859000, B2=1420146000
2019-12-19lobsterfordinnerC-PRP
M7981327/526912203645241 : 5B2A7A02DE6924D0
PRP: Verified
PRP without proof (not generated)
2018-06-28_p95holder_C-PRP
M7981327/526912203645241 : 5B2A7A02DE6924D0
PRP: Verified
PRP without proof (not generated)