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
40972999Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 272
P-1
B1 = 670000
B2 = 670000
LL
StatusDateUserResidueShift
Verified2008-09-16Donald StromD99C7BBDA9B618F534139853
Verified2017-05-17GrunwalderGIMPD99C7BBDA9B618F514100781
History
DateUserTypeResult
2024-05-29mrhNF
no factor from 2^68 to 2^69
2022-05-01Sid & AndyNF
no factor from 2^72 to 2^73
2017-05-17GrunwalderGIMPC-LL
D99C7BBDA9B618F5
2015-06-19Gordon SpenceNF
no factor from 2^71 to 2^72
2014-12-291997rj7NF
no factor from 2^70 to 2^71
2014-12-25chalsallNF
no factor from 2^69 to 2^70
2013-10-31Carsten KossendeyNF
no factor from 2^68 to 2^69