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
1666843Factored
FactorDigitsBitsDate
140596873575611443.7old
2687413733900153767372167.92019-12-09 17:17:17
167142817768401190305432373.82019-03-09 22:22:33
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 Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-02Oliver Kruse67214C8080ED17891013
Verified (Factored)2017-11-02ATH67214C8080ED1789196324513
Verified (Factored)2019-03-10_p95holder_4389FE82243E772C2135174353
Verified (Factored)2019-03-12Ruzovej4389FE82243E772C2148082153
Verified2019-12-11mnd94389FE82243E772C357716053
Verified2019-12-12ANONYMOUS4389FE82243E772C353200653
History
DateUserTypeResult
2019-12-12ANONYMOUSC-PRP
M1666843/14059687357561/16714281776840119030543/268741373390015376737 : 4389FE82243E772C
PRP: Verified
PRP without proof (not generated)
2019-12-11mnd9C-PRP
M1666843/14059687357561/268741373390015376737/16714281776840119030543 : 4389FE82243E772C
PRP: Verified
PRP without proof (not generated)
2019-12-09TJAOIF-ECM
Factor: 268741373390015376737 / (ECM curve 9, B1=50000, B2=5000000)
2019-03-12RuzovejC-PRP
M1666843/14059687357561/16714281776840119030543 : 4389FE82243E772C
PRP: Verified
PRP without proof (not generated)
2019-03-10_p95holder_C-PRP
M1666843/14059687357561/16714281776840119030543 : 4389FE82243E772C
PRP: Verified
PRP without proof (not generated)
2019-03-09Chang Chia-TcheF-ECM
Factor: 16714281776840119030543 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-02ATHC-PRP
M1666843/14059687357561 : 67214C8080ED1789
PRP: Verified
PRP without proof (not generated)
2017-10-02Oliver KruseC-PRP
M1666843/14059687357561 : 67214C8080ED1789
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12