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
21517031Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 269
P-1
B1 = 220000
B2 = 1650000
LL
StatusDateUserResidueShift
Verified2004-10-18Matthew WinegarCF444FC1674F132A19439587
Bad2009-03-18-Anonymous-493082976D408EFA3446911
Verified2009-04-09-Anonymous-CF444FC1674F132A19705452
History
DateUserTypeResult
2023-03-09Naegi MakotoNF
no factor from 2^72 to 2^73
2021-05-27-Anonymous-NF
no factor from 2^71 to 2^72
2021-05-27-Anonymous-NF
no factor from 2^70 to 2^71
2017-12-04YxinityNF
no factor from 2^69 to 2^70
2017-11-21VictordeHollanderNF
no factor from 2^68 to 2^69
2017-04-15ramgeisNF
no factor from 2^67 to 2^68
2015-05-09NRNF
no factor from 2^66 to 2^67
2009-04-09-Anonymous-C-LL
CF444FC1674F132A
2009-03-18-Anonymous-C-LL
493082976D408EFA