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

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MnStatusDetails
11661197Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
3779356656824561591858.4old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-10-02peoplesFB806001729F491E11114924253
P-1 factors
DateFactorB1B2
2021-10-033779356656824561595000050000
History
DateUserTypeResult
2025-06-12yuriy_5-1NF
no factor from 2^70 to 2^71
2025-05-06yuriy_5-1NF
no factor from 2^69 to 2^70
2025-03-31yuriy_5-1NF
no factor from 2^68 to 2^69
2025-03-11yuriy_5-1NF-PM1
B1=6996714, B2=453435840
2024-08-21yuriy_5-1NF-PM1
B1=2800000, B2=5818231650
2023-05-11This -Anonymous-NF-PM1
B1=100000, B2=2000000, E=6
2021-10-03peoplesF-PM1
Factor: 377935665682456159 / (P-1, B1=50000)
2021-10-02curtiscCERT
PRP Certification
Proof certified good
2021-10-02peoplesC-PRP
M11661197/377935665682456159 : FB806001729F491E
PRP proof power = 8
PRP: Verified
Proof certified good