Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
18392161Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 269
P-1
B1 = 1000000
B2 = 1504038900
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
LL
StatusDateUserResidueShift
Verified2003-05-04outofoptions22C8BC59E9F0246A8814934
Verified2003-07-21outofoptions22C8BC59E9F0246A8814934
Verified2007-03-20Chris St. Jean22C8BC59E9F0246A172592
History
DateUserTypeResult
2024-09-14Naegi MakotoNF-PM1
B1=1000000, B2=1504038900
2021-05-30-Anonymous-NF
no factor from 2^72 to 2^73
2021-05-29-Anonymous-NF
no factor from 2^71 to 2^72
2021-05-29-Anonymous-NF
no factor from 2^70 to 2^71
2020-02-19lycornNF
no factor from 2^69 to 2^70
2019-05-21USAFSSNF-PM1
B1=330000, B2=8745000, E=12
2017-09-30ramgeisNF
no factor from 2^68 to 2^69
2017-09-30ramgeisNF
no factor from 2^67 to 2^68
2014-08-13NesowaNF
no factor from 2^66 to 2^67