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

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MnStatusDetails
12191903Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
645634659106071445.9old
8858879582507771549.72014-05-08 12:17:08
66708252414939117591962.52016-08-25 11:25:53
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-02-08PoaoAFCB95DD8A5AE0D53433975053
History
DateUserTypeResult
2022-02-08Simon JosefssonCERT
PRP Certification
Proof certified good
2022-02-08PoaoC-PRP
M12191903/64563465910607/885887958250777/6670825241493911759 : AFCB95DD8A5AE0D5
PRP proof power = 8
PRP: Verified
Proof certified good
2022-02-01nordiNF-PM1
B1=400000, B2=275144100
2022-01-24nordiNF-PM1
B1=400000
2016-08-25TJAOIF
Factor: 6670825241493911759 / TF: 62-63
2014-05-08TJAOIF
Factor: 885887958250777