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
7921621
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 267
Factored
FactorDigitsBitsDate
174275663927.4old
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2018-06-07storm55103A4D4673C3AA83431302385853
Verified
PRP without proof (not generated)
2019-11-19ATH3A4D4673C3AA83431595137153
History
DateUserTypeResult
2024-02-05Stef42NF-PM1B1=950000, B2=1968826860
2019-11-19ATHC-PRPM7921621/174275663 : 3A4D4673C3AA8343
2018-06-07storm5510C-PRPM7921621/174275663 : 3A4D4673C3AA8343