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
28041217Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 270
P-1
B1 = 1000000
B2 = 30000000
LL
StatusDateUserResidueShift
Verified2006-04-14Sturle SundeE5418785E91C3E2410166181
Verified2011-10-21ANONYMOUSE5418785E91C3E246004066
History
DateUserTypeResult
2021-11-25Sid & AndyNF-PM1
B1=1000000, B2=30000000
2021-10-06TheJudgerNF
no factor from 2^74 to 2^75
2021-09-12TheJudgerNF
no factor from 2^73 to 2^74
2021-08-24TheJudgerNF
no factor from 2^72 to 2^73
2021-08-22TheJudgerNF
no factor from 2^71 to 2^72
2020-12-19mikrNF
no factor from 2^70 to 2^71
2017-09-04YxinityNF
no factor from 2^69 to 2^70
2017-09-04YxinityNF
no factor from 2^68 to 2^69
2011-10-21ANONYMOUSC-LL
E5418785E91C3E24
2010-12-09Carsten KossendeyNF
no factor from 2^67 to 2^68