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

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MnStatusDetails
11661863Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
52505561950557594791962.2old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-10-05_p95holder_6F57941661AE20F71807894953
Verified2021-10-06LaurV6F57941661AE20F711155152153
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=6997116, B2=453435840
2024-08-21yuriy_5-1NF-PM1
B1=2800000, B2=5818231650
2021-10-06schweigmonCERT
PRP Certification
Proof certified good
2021-10-06LaurVC-PRP
M11661863/5250556195055759479 : 6F57941661AE20F7
PRP proof power = 8
PRP: Verified
Proof certified good
2021-10-05_p95holder_C-PRP
M11661863/5250556195055759479 : 6F57941661AE20F7
PRP: Verified
PRP without proof (not generated)