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
27861767Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 270
P-1
B1 = 310000
B2 = 4107500
LL
StatusDateUserResidueShift
Verified2007-02-20C. Cooper / S. Boone739C6A9C6479891F18300161
Verified2012-01-20usmfun739C6A9C6479891F4039144
History
DateUserTypeResult
2021-10-07TheJudgerNF
no factor from 2^74 to 2^75
2021-09-12TheJudgerNF
no factor from 2^73 to 2^74
2021-08-23TheJudgerNF
no factor from 2^72 to 2^73
2021-04-28Sid & AndyNF
no factor from 2^71 to 2^72
2021-03-31mikrNF
no factor from 2^70 to 2^71
2017-04-02ramgeisNF
no factor from 2^69 to 2^70
2012-01-20usmfunC-LL
739C6A9C6479891F
2011-09-25hustensaftNF
no factor from 2^68 to 2^69
2011-09-21Carsten KossendeyNF
no factor from 2^67 to 2^68