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
7983571Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
79835711826.3old
441382138580740871755.32008-03-11 03:33:59
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-06-28_p95holder_B0FA3A54C169923D2227206453
Verified2019-12-20daveward2005B0FA3A54C169923D2391997153
History
DateUserTypeResult
2024-02-14Stef42NF-PM1
B1=859000, B2=1420146000
2019-12-20daveward2005C-PRP
M7983571/79835711/44138213858074087 : B0FA3A54C169923D
PRP: Verified
PRP without proof (not generated)
2018-06-28_p95holder_C-PRP
M7983571/79835711/44138213858074087 : B0FA3A54C169923D
PRP: Verified
PRP without proof (not generated)