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
8173943
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 269
TF target 267
Factored
FactorDigitsBitsDate
16347887824.0old
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
PRP without proof (not generated)
2018-09-07Oliver KruseEB49AA5FF2D5AC8C1768121653
Verified
PRP without proof (not generated)
2020-04-19Luigi MorelliEB49AA5FF2D5AC8C1109757753
History
DateUserTypeResult
2025-05-13Wentao HuangNF-PM1B1=1080000, B2=102777150
2023-12-18FlaukrotistNFno factor TF: 68-69
2022-08-11FlaukrotistNFno factor TF: 67-68
2020-04-19Luigi MorelliC-PRPM8173943/16347887 : EB49AA5FF2D5AC8C
2018-09-07Oliver KruseC-PRPM8173943/16347887 : EB49AA5FF2D5AC8C