Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
8031131Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
787050839929.6old
400043258923573671755.22008-03-11 03:34:59
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-07-17_p95holder_F631F4980DE23C9A2253734553
Verified2020-01-08Alvin BunkF631F4980DE23C9A2714637453
History
DateUserTypeResult
2024-02-24Stef42NF-PM1
B1=944000, B2=1792472220
2020-01-08Alvin BunkC-PRP
M8031131/787050839/40004325892357367 : F631F4980DE23C9A
PRP: Verified
PRP without proof (not generated)
2018-07-17_p95holder_C-PRP
M8031131/787050839/40004325892357367 : F631F4980DE23C9A
PRP: Verified
PRP without proof (not generated)