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
18274859Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
124269041211133.5old
5003290897031238.92008-09-08 14:28:28
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2025-09-14d909RCA556013E1FABC80442467542253
History
DateUserTypeResult
2025-09-14Fabrice BelletCERT
PRP Certification
Proof certified good
2025-09-14d909RCAC-PRP
M18274859/12426904121/500329089703 : 556013E1FABC8044
PRP proof power = 8
PRP: Verified
Proof certified good
2025-08-30nordiNF-PM1
B1=500000, B2=261614430
2008-09-08Will EdgingtonF
Factor: 500329089703