Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
11657287Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
868467881511136.3old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-10-02RichD0976F834FDF81461F1818738553
History
DateUserTypeResult
2025-06-12yuriy_5-1NF
no factor from 2^70 to 2^71
2025-05-05yuriy_5-1NF
no factor from 2^69 to 2^70
2025-03-28yuriy_5-1NF
no factor from 2^68 to 2^69
2025-03-10yuriy_5-1NF-PM1
B1=6994368, B2=453435840
2025-02-10yuriy_5-1NF-PM1
B1=4662912, B2=598008840
2024-06-17yuriy_5-1NF-PM1
B1=262144, B2=137022600
2021-10-02curtiscCERT
PRP Certification
Proof certified good
2021-10-02RichD0C-PRP
M11657287/86846788151 : 976F834FDF81461F
PRP proof power = 8
PRP: Verified
Proof certified good