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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Exponent Range:










MnStatusDetails
1680919Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
2804429021922471548.0old
16755170735586224911669392892890.42023-01-30 12:10:28
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)2025-09-02Kriesel14365B3712432F06013
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-02Oliver Kruse09CC70BCC2576B1C1013
Verified (Factored)2017-11-03kkmrkkblmbrbk09CC70BCC2576B1C131734613
Verified2023-01-30LordJulius14365B3712432F062106220153
History
DateUserTypeResult
2025-09-03JochenDECERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
14365B3712432F06
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2023-01-30Benson Murage KibeCERT
PRP Certification
Proof certified good
2023-01-30LordJuliusC-PRP
M1680919/280442902192247/1675517073558622491166939289 : 14365B3712432F06
PRP proof power = 6
PRP: Verified
Proof certified good
2023-01-30TJAOIF-ECM
Factor: 1675517073558622491166939289 / (ECM curve 45, B1=250000, B2=40000000, Sigma=8578436826832290)
2017-11-03kkmrkkblmbrbkC-PRP
M1680919/280442902192247 : 09CC70BCC2576B1C
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-02Oliver KruseC-PRP
M1680919/280442902192247 : 09CC70BCC2576B1C
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12