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
6940663Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
4100543700411238.6old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-01-21trebor79FE38DEEBF241BA1663169153
Verified2019-02-02Chang Chia-Tche79FE38DEEBF241BA186544253
History
DateUserTypeResult
2023-12-27Stef42NF-PM1
B1=562000, B2=960946350
2019-02-02Chang Chia-TcheC-PRP
M6940663/410054370041 : 79FE38DEEBF241BA
PRP: Verified
PRP without proof (not generated)
2018-01-21treborC-PRP
M6940663/410054370041 : 79FE38DEEBF241BA
PRP: Verified
PRP without proof (not generated)