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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MnDetails
8321809
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 268
Factored
FactorDigitsBitsDate
22468884311031.1old
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
PRP without proof (not generated)
2018-10-21Chang Chia-Tche281F2CD8201BF1981593586553
Verified
PRP without proof (not generated)
2020-04-19marssystems281F2CD8201BF1981142506053
History
DateUserTypeResult
2024-06-10Stef42NF-PM1B1=1375000, B2=2788626750
2020-04-19marssystemsC-PRPM8321809/2246888431 : 281F2CD8201BF198
2018-10-21Chang Chia-TcheC-PRPM8321809/2246888431 : 281F2CD8201BF198