Marin Mersenne 2^P-1
Username
Password
Forgot password?
Blue
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
11801939Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 268
P-1
B1 = 1822500
B2 = 1108393650
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0 ⓘ
LL
StatusDateUserResidueShift
Verified2001-03-11Lars Lindley83C4428855C90C5110499076
Verified2004-04-20Penny Black S83C4428855C90C513133176
History
DateUserTypeResult
2024-11-17TheJudgerNF
no factor from 2^72 to 2^73
2024-04-27kurlyNF-PM1
B1=1822500, B2=1108393650
2022-11-04Naegi MakotoNF
no factor from 2^71 to 2^72
2021-10-12mikrNF
no factor from 2^70 to 2^71
2021-09-19lycornNF
no factor from 2^69 to 2^70
2019-05-04riccardo ubertiNF-PM1
B1=430000, B2=8500000, E=12
2018-01-09ramgeisNF
no factor from 2^68 to 2^69
2018-01-09ramgeisNF
no factor from 2^67 to 2^68
2016-02-15VictordeHollanderNF
no factor from 2^66 to 2^67
2013-11-02NesowaNF
no factor from 2^65 to 2^66
2013-10-24lycornNF
no factor from 2^64 to 2^65