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

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MnStatusDetails
1750811Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
3501623721.7old
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)2025-09-02Kriesel43CE26CFD6E93737013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-03Oliver Kruse4B7ECE9DC1EC53651013
Verified2017-11-03kkmrkkblmbrbk4B7ECE9DC1EC53651129246413
History
DateUserTypeResult
2025-09-03ikeCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
43CE26CFD6E93737
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-11-03kkmrkkblmbrbkC-PRP
M1750811/3501623 : 4B7ECE9DC1EC5365
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1750811/3501623 : 4B7ECE9DC1EC5365
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12