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
8001647Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
23309158497741681831961.0old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-07-06_p95holder_5522774C85372B501141676453
Verified2019-12-27arnaud5522774C85372B501598771953
History
DateUserTypeResult
2024-02-24Stef42NF-PM1
B1=875000, B2=1756495650
2019-12-27arnaudC-PRP
M8001647/2330915849774168183 : 5522774C85372B50
PRP: Verified
PRP without proof (not generated)
2018-07-06_p95holder_C-PRP
M8001647/2330915849774168183 : 5522774C85372B50
PRP: Verified
PRP without proof (not generated)