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

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MnStatusDetails
11631161Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
69786967826.1old
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-09-25LaurVE7BBCF42CDFE692C1363795653
History
DateUserTypeResult
2025-06-10yuriy_5-1NF
no factor from 2^70 to 2^71
2025-05-05yuriy_5-1NF
no factor from 2^69 to 2^70
2025-03-31yuriy_5-1NF
no factor from 2^68 to 2^69
2025-03-11yuriy_5-1NF-PM1
B1=6978696, B2=448598700
2025-02-10yuriy_5-1NF-PM1
B1=4652464, B2=598008840
2024-06-17yuriy_5-1NF-PM1
B1=262144, B2=137022600
2021-09-25Ben DeloCERT
PRP Certification
Proof certified good
2021-09-25LaurVC-PRP
M11631161/69786967 : E7BBCF42CDFE692C
PRP proof power = 8
PRP: Verified
Proof certified good