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
18864253Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 269
P-1
B1 = 1000000
B2 = 500458530
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
LL
StatusDateUserResidueShift
Verified2003-05-04Mats Ramnefors36FBEAA8A3BBD912875671
Verified2003-12-13Marc Honey36FBEAA8A3BBD91212833741
History
DateUserTypeResult
2022-04-04alpertronNF-PM1
B1=1000000, B2=500458530
2021-11-12-Anonymous-NF
no factor from 2^72 to 2^73
2021-10-08-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-12SRBaseNF
no factor from 2^70 to 2^71
2020-12-11James HeinrichNF-PM1
B1=338000, B2=9653000, E=12
2020-01-19lycornNF
no factor from 2^69 to 2^70
2017-10-19ramgeisNF
no factor from 2^68 to 2^69
2017-10-17YxinityNF
no factor from 2^67 to 2^68
2014-08-02NesowaNF
no factor from 2^66 to 2^67