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
12278423Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
4770365754815691548.8old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-02-24Poao382209B19D9D65651779014253
History
DateUserTypeResult
2022-02-24mattashiiCERT
PRP Certification
Proof certified good
2022-02-24PoaoC-PRP
M12278423/477036575481569 : 382209B19D9D6565
PRP proof power = 8
PRP: Verified
Proof certified good
2022-02-21nordiNF-PM1
B1=400000, B2=303696120
2022-02-06nordiNF-PM1
B1=400000