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
1702879Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1809707547416331547.4old
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-02Kriesel2804F94747005923013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertron6D8D91517259DB3B1013
Verified2017-10-18Oliver Kruse6D8D91517259DB3B1146870613
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
2804F94747005923
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-10-18Oliver KruseC-PRP
M1702879/180970754741633 : 6D8D91517259DB3B
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1702879/180970754741633 : 6D8D91517259DB3B
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12