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
18734371Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 269
P-1
B1 = 1200000
B2 = 495951540
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
LL
StatusDateUserResidueShift
Verified2003-05-19Northwestern College1B7F00DE8C7FC0848883376
Verified2007-02-05Pedro1B7F00DE8C7FC08414931303
History
DateUserTypeResult
2024-12-01Sid & AndyNF-PM1
B1=1200000, B2=495951540
2021-11-05-Anonymous-NF
no factor from 2^72 to 2^73
2021-10-08-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-11SRBaseNF
no factor from 2^70 to 2^71
2020-02-01lycornNF
no factor from 2^69 to 2^70
2018-01-22ramgeisNF
no factor from 2^68 to 2^69
2018-01-22ramgeisNF
no factor from 2^67 to 2^68
2017-06-05ThaNF-PM1
B1=350000, B2=7000000, E=6
2016-03-26Mark RoseNF
no factor from 2^66 to 2^67