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
8021791Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
144392239927.1old
43798978871032.02008-09-08 03:44:17
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-07-26_p95holder_C6FCCE62B9053E882753147053
Verified2020-01-01mnd9C6FCCE62B9053E882637878353
History
DateUserTypeResult
2024-02-24Stef42NF-PM1
B1=937000, B2=1792472220
2020-01-01mnd9C-PRP
M8021791/144392239/4379897887 : C6FCCE62B9053E88
PRP: Verified
PRP without proof (not generated)
2018-07-26_p95holder_C-PRP
M8021791/144392239/4379897887 : C6FCCE62B9053E88
PRP: Verified
PRP without proof (not generated)
2008-09-08Will EdgingtonF
Factor: 4379897887