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

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MnStatusDetails
15438131Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
28714923671031.4old
4046435584925290791858.52015-09-09 11:13:07
3814323859398237899032168.42023-07-17 10:20:35
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-08-02PerigD07D0AF8B90E3B5031489099453
P-1 factors
DateFactorB1B2
2023-07-17381432385939823789903480000308477400
History
DateUserTypeResult
2023-08-02curtiscCERT
PRP Certification
Proof certified good
2023-08-02PerigC-PRP
M15438131/2871492367/404643558492529079/381432385939823789903 : D07D0AF8B90E3B50
PRP proof power = 8
PRP: Verified
Proof certified good
2023-07-17nordiF-PM1
Factor: 381432385939823789903 / (P-1, B1=480000, B2=308477400)
2023-06-19nordiNF-PM1
B1=480000
2015-09-09TJAOIF
Factor: 404643558492529079 / TF: 58-59