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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
15500489Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 269
P-1
B1 = 1500000
B2 = 830821740
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
LL
StatusDateUserResidueShift
VerifiedMartin Fahlgren88CB761E28EB305D13753347
Verified2006-07-25arnaud88CB761E28EB305D5439189
History
DateUserTypeResult
2022-04-06Sid & AndyNF-PM1
B1=1500000, B2=830821740
2022-01-16Anton RepkoNF
no factor from 2^72 to 2^74
2021-09-25-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-08SRBaseNF
no factor from 2^70 to 2^71
2021-05-31lycornNF
no factor from 2^69 to 2^70
2018-03-04ramgeisNF
no factor from 2^68 to 2^69
2018-03-04ramgeisNF
no factor from 2^67 to 2^68
2016-04-13ThaNF-PM1
B1=300000, B2=6000000, E=12
2016-03-16Mark RoseNF
no factor from 2^65 to 2^66
2013-12-28NesowaNF
no factor from 2^66 to 2^67