Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
13121Factored
FactorDigitsBitsDate
88837980751511343.0old
29031047909754607443736260504079631052739127.82021-09-13 20:13:44
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001386 / 9201
Estimated T-Level: 40.8
TF below 2^130 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-21Oliver Kruse8CE135D75B37B59E1013
Verified (Factored)2017-10-12kkmrkkblmbrbk8CE135D75B37B59E1680413
Verified (Factored)2020-04-17Oliver Kruse88DD75E8482DCDAE11007253
Verified2021-09-13nordi88DD75E8482DCDAE2959653
Verified2021-09-13SRJ287788DD75E8482DCDAE2424253
P-1 factors
DateFactorB1B2
2023-10-10290310479097546074437362605040796310527100000000000122154521813133808
History
DateUserTypeResult
2023-10-10-Anonymous-F-PM1
Factor: 290310479097546074437362605040796310527 / (P-1, B1=100000000000, B2=122154521813133810)
2023-05-17JacobZNF-PM1
B1=8400000000, B2=34523926202766000
2022-02-05JossNF-PM1
B1=1000000, B2=3910366209750
2021-09-13SRJ2877C-PRP
M13121/8883798075151/290310479097546074437362605040796310527 : 88DD75E8482DCDAE
PRP: Verified
PRP without proof (small exponent)
2021-09-13nordiC-PRP
M13121/8883798075151/290310479097546074437362605040796310527 : 88DD75E8482DCDAE
PRP: Verified
PRP without proof (small exponent)
2021-09-13nordiF-ECM
Factor: 290310479097546074437362605040796310527 / (ECM curve 363, B1=3000000, B2=528000000, Sigma=4821442541923566)
2020-04-17Oliver KruseC-PRP
M13121/8883798075151 : 88DD75E8482DCDAE
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M13121/8883798075151 : 8CE135D75B37B59E
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13121/8883798075151 : 8CE135D75B37B59E
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13121/8883798075151 : 8CE135D75B37B59E
PRP without proof (not generated)