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
11227283Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
22454567824.4old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-06-14/r/counting7B1196BBE13C4C2D1954575053
History
DateUserTypeResult
2025-06-30vshNF
no factor from 2^71 to 2^72
2025-04-15vshNF
no factor from 2^70 to 2^71
2025-03-06vshNF
no factor from 2^69 to 2^70
2025-01-31vshNF
no factor from 2^68 to 2^69
2021-06-14LovinTenderTuCERT
PRP Certification
Proof certified good
2021-06-14/r/countingC-PRP
M11227283/22454567 : 7B1196BBE13C4C2D
PRP proof power = 8
PRP: Verified
Proof certified good