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

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MnStatusDetails
18303557Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1357869440929495485912166.92014-08-13 03:10:18
LL
StatusDateUserResidueShift
Verified (Factored)2003-04-03Bourit Cyril8907762E75F872F017290052
Verified (Factored)2007-09-13Christian Mead8907762E75F872F013258576
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2025-09-22nordi95F9170257A9144011182063953
History
DateUserTypeResult
2025-09-23George WoltmanCERT
PRP Certification
Proof certified good
2025-09-23Section 31CERT
PRP Certification
Certification bad
2025-09-22nordiC-PRP
M18303557/135786944092949548591 : 95F9170257A91440
PRP proof power = 8
PRP: Verified
Certification bad
Proof certified good
2025-09-11nordiNF-PM1
B1=1000000, B2=418592790
2014-08-13NesowaF
Factor: 135786944092949548591 / TF: 66-67