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
4179289Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 265
TF below 2^77 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 6200000
B2 = 28122644550
ECM
DigitsB1Curves
2550000255 / 280
Estimated T-Level: 24.6 ⓘ
LL
StatusDateUserResidueShift
Verified1999-02-07Cornelis Zijlstra38BFBBA16E2125AE2793062
Verified2000-02-01Chris Koeberle38BFBBA16E2125AE1950573
History
DateUserTypeResult
2024-12-04Andrew BNF
no factor from 2^71 to 2^72
2022-12-12DRobinsonPENF-PM1
B1=6200000, B2=28122644550
2022-05-28mikrNF
no factor from 2^70 to 2^71
2021-07-09axnNF
no factor from 2^69 to 2^70
2021-06-28TJAOINF
no factor from 2^68 to 2^69
2021-04-04Dylan DelgadoNF-PM1
B1=400000, B2=12000000, e=12
2018-12-07YxinityNF
no factor from 2^67 to 2^68
2017-12-21YxinityNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-05snme2pm1NF
no factor from 2^65 to 2^66
2013-11-10David CampeauNF
no factor from 2^64 to 2^65
2013-10-18JayderNF
no factor from 2^63 to 2^64
2013-08-17Squeeky_SquirrelNF-PM1
B1=125000, B2=2406250, E=6
2011-08-22USAFSSNF-PM1
B1=45000, B2=630000, E=6
2011-07-17GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-02-02Grant McCrackenNF
no factor from 2^61 to 2^62
2009-08-04Carsten KossendeyNF-PM1
B1=25000, B2=337500