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
15602221Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
71338036014433271652.7old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-08-18Perig87050B9ACAC0EE5C11328987353
History
DateUserTypeResult
2023-08-18curtiscCERT
PRP Certification
Proof certified good
2023-08-18PerigC-PRP
M15602221/7133803601443327 : 87050B9ACAC0EE5C
PRP proof power = 8
PRP: Verified
Proof certified good
2023-07-24nordiNF-PM1
B1=480000, B2=308477400
2023-07-12nordiNF-PM1
B1=480000