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
18291293Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
20500052964652971650.9old
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2025-09-15ANONYMOUS5B38C8430876E83A1053
History
DateUserTypeResult
2025-09-15PoaoCERT
PRP Certification
Proof certified good
2025-09-15ANONYMOUSC-PRP
M18291293/2050005296465297 : 5B38C8430876E83A
PRP proof power = 9
PRP: Verified
Proof certified good
2025-09-07nordiNF-PM1
B1=500000, B2=261614430