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
11666257Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
572323125776533931755.7old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-10-04kutensB68E1DE87E33C7181988206653
History
DateUserTypeResult
2025-06-13yuriy_5-1NF
no factor from 2^70 to 2^71
2025-05-06yuriy_5-1NF
no factor from 2^69 to 2^70
2025-03-28yuriy_5-1NF
no factor from 2^68 to 2^69
2025-03-11yuriy_5-1NF-PM1
B1=6999750, B2=453435840
2025-02-10yuriy_5-1NF-PM1
B1=4666500, B2=598008840
2024-06-17yuriy_5-1NF-PM1
B1=262144, B2=137022600
2021-10-04RyanMcCartenCERT
PRP Certification
Proof certified good
2021-10-04kutensC-PRP
M11666257/57232312577653393 : B68E1DE87E33C718
PRP proof power = 8
PRP: Verified
Proof certified good