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
4280203Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 265
P-1
B1 = 6200000
B2 = 27202435260
ECM
DigitsB1Curves
2550000201 / 280
Estimated T-Level: 23.6 ⓘ
LL
StatusDateUserResidueShift
Verified1998-05-16Martin Koster4EE50389377F96050
Verified2001-04-21Paul Victor Novarese4EE50389377F96053080708
History
DateUserTypeResult
2024-11-17TheJudgerNF
no factor from 2^72 to 2^73
2024-11-17TheJudgerNF
no factor from 2^71 to 2^72
2022-06-25DRobinsonPENF-PM1
B1=6200000, B2=27202435260
2021-01-24-Anonymous-NF
no factor from 2^70 to 2^71
2021-01-23-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-23-Anonymous-NF
no factor from 2^68 to 2^69
2018-11-16chuenkitNF
no factor from 2^67 to 2^68
2018-04-26chuenkitNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-07-22David CampeauNF-PM1
B1=1145000, B2=30915000, E=12
2015-06-13snme2pm1NF
no factor from 2^65 to 2^66
2014-08-15-Anonymous-NF-PM1
B1=64996
2014-05-30lycornNF
no factor from 2^64 to 2^65
2014-05-05JayderNF
no factor from 2^63 to 2^64
2012-01-31GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-09-01Squeeky_SquirrelNF-PM1
B1=50000, B2=762500, E=6
2010-12-31markrNF
no factor from 2^61 to 2^62