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
40578497Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 272
P-1
B1 = 1000000
B2 = 20000000
LL
StatusDateUserResidueShift
Verified2009-09-01-Anonymous-6CE56B80539160DC4132744
Verified2015-09-26frolyar6CE56B80539160DC1479843
History
DateUserTypeResult
2024-05-29mrhNF
no factor from 2^68 to 2^69
2020-09-08Sid & AndyNF
no factor from 2^74 to 2^75
2020-06-24Sid & AndyNF-PM1
B1=1000000, B2=20000000, E=12
2020-01-17-Anonymous-NF
no factor from 2^73 to 2^74
2019-09-30-Anonymous-NF
no factor from 2^72 to 2^73
2015-09-26frolyarC-LL
6CE56B80539160DC
2015-05-11tigreroarsNF
no factor from 2^71 to 2^72
2014-12-28NickOfTimeNF
no factor from 2^70 to 2^71
2014-12-28NickOfTimeNF
no factor from 2^69 to 2^70
2013-11-08Carsten KossendeyNF
no factor from 2^68 to 2^69
2009-09-01BartC-LL
6CE56B80539160DC
2009-07-26BartNF-PM1
B1=670000