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
40891261Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 272
P-1
B1 = 1000000
B2 = 20000000
LL
StatusDateUserResidueShift
Verified2008-03-22jack deal4FD3749EFB88337C32171128
Verified2016-12-17kallsop4FD3749EFB88337C5595674
History
DateUserTypeResult
2024-05-29mrhNF
no factor from 2^68 to 2^69
2020-10-19Sid & AndyNF-PM1
B1=1000000, B2=20000000, E=12
2020-01-10-Anonymous-NF
no factor from 2^73 to 2^74
2019-09-30-Anonymous-NF
no factor from 2^72 to 2^73
2016-12-17kallsopC-LL
4FD3749EFB88337C
2015-06-05Sid & AndyNF
no factor from 2^71 to 2^72
2015-01-11megavinkNF
no factor from 2^70 to 2^71
2015-01-11megavinkNF
no factor from 2^69 to 2^70
2013-10-31Carsten KossendeyNF
no factor from 2^68 to 2^69