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
6480913Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 266
TF below 2^80 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 4000000
B2 = 18004726740
ECM
DigitsB1Curves
2550000280 / 280
3025000078 / 640
Estimated T-Level: 25.6 ⓘ
LL
StatusDateUserResidueShift
Verified1999-08-07Team love_fest762E2BFCBBDCECC02142890
Verified2001-04-21David Hamer762E2BFCBBDCECC04811329
History
DateUserTypeResult
2023-05-28linamentNF-PM1
B1=4000000, B2=18004726740
2022-08-17takahashiNF-PM1
B1=2500000, B2=50028510
2021-10-11SRBaseNF
no factor from 2^71 to 2^72
2021-08-10SRBaseNF
no factor from 2^70 to 2^71
2021-03-18takahashiNF
no factor from 2^69 to 2^70
2019-12-01mnd9NF
no factor from 2^68 to 2^69
2018-06-06ramgeisNF
no factor from 2^67 to 2^68
2016-04-14Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-10-26snme2pm1NF
no factor from 2^65 to 2^66
2014-10-02NesowaNF-PM1
B1=395000, B2=10072500, E=12
2014-08-09lycornNF
no factor from 2^64 to 2^65
2014-08-02NesowaNF
no factor from 2^63 to 2^64
2009-06-21Carsten KossendeyNF-PM1
B1=35000, B2=498750