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
9128681Factored
FactorDigitsBitsDate
54772087825.7old
73029449826.12008-09-08 05:24:50
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-06-30Ivan M728D8902C2501A452344628653
Verified2020-10-22kutens728D8902C2501A4525371253
History
DateUserTypeResult
2022-10-01LordJuliusNF
no factor from 2^68 to 2^69
2022-10-01LordJuliusNF
no factor from 2^67 to 2^68
2022-10-01LordJuliusNF
no factor from 2^66 to 2^67
2022-10-01LordJuliusNF
no factor from 2^65 to 2^66
2022-10-01LordJuliusNF
no factor from 2^64 to 2^65
2022-01-22LordJuliusNF-PM1
B1=10000000, B2=12893923350
2020-10-22Valerio BellizzomiCERT
PRP Certification
Proof certified good
2020-10-22kutensC-PRP
M9128681/54772087/73029449 : 728D8902C2501A45
PRP proof power = 8
PRP: Verified
Proof certified good
2019-07-01Ivan MNF-PM1
B1=100000, B2=1000000, E=6
2019-06-30Ivan MNF
no factor from 2^52 to 2^60
2019-06-30Ivan MNF
no factor from 2^50 to 2^52
2019-06-30Ivan MNF
no factor from 2^25 to 2^50
2019-06-30Ivan MC-PRP
M9128681/54772087/73029449 : 728D8902C2501A45
PRP: Verified
PRP without proof (not generated)
2008-09-08Will EdgingtonF
Factor: 73029449