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
20771287Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 269
P-1
B1 = 250000
B2 = 5875000
LL
StatusDateUserResidueShift
Verified2004-01-18Sturle Sunde95633D94A77CEBF25659113
Verified2008-07-25Ars Technica Team Prime Rib95633D94A77CEBF23824929
History
DateUserTypeResult
2021-12-22-Anonymous-NF
no factor from 2^73 to 2^74
2021-11-19-Anonymous-NF
no factor from 2^72 to 2^73
2021-09-25-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-14SRBaseNF
no factor from 2^70 to 2^71
2018-05-25ramgeisNF
no factor from 2^69 to 2^70
2017-10-17VictordeHollanderNF
no factor from 2^68 to 2^69
2017-04-28ramgeisNF
no factor from 2^67 to 2^68
2015-03-25NRNF
no factor from 2^66 to 2^67