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

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MnStatusDetails
1757387Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1205883811671236.8old
36039965379911341.72008-07-15 07:46:12
1348752114812304803835672476.82023-03-27 10:57:35
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)2025-09-02KrieselB51CFBFC24A99564013
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-03Oliver Kruse94407C02CB1228A22013
Verified (Factored)2017-11-04kkmrkkblmbrbk94407C02CB1228A2225017713
Verified2023-03-29retsuB51CFBFC24A99564318504853
History
DateUserTypeResult
2025-09-03Architects CubedCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
B51CFBFC24A99564
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2023-03-29mhoneyCERT
PRP Certification
Proof certified good
2023-03-29retsuC-PRP
M1757387/120588381167/3603996537991/134875211481230480383567 : B51CFBFC24A99564
PRP proof power = 7
PRP: Verified
Proof certified good
2023-03-27TJAOIF-ECM
Factor: 134875211481230480383567 / (ECM curve 13, B1=250000, B2=40000000, Sigma=5132376219321165)
2017-11-04kkmrkkblmbrbkC-PRP
M1757387/120588381167/3603996537991 : 94407C02CB1228A2
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1757387/120588381167/3603996537991 : 94407C02CB1228A2
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-15J FeitsmaF
Factor: 3603996537991