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
19406171Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 269
P-1
B1 = 800000
B2 = 832554450
LL
StatusDateUserResidueShift
Verified2005-03-20C. Cooper / S. BooneB64985F41403637C17342554
Verified2007-05-28Ars Technica Team Prime RibB64985F41403637C6853808
History
DateUserTypeResult
2022-03-22Seth_TrNF-PM1
B1=800000, B2=832554450
2021-11-12-Anonymous-NF
no factor from 2^72 to 2^73
2021-10-01-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-13SRBaseNF
no factor from 2^70 to 2^71
2019-12-13lycornNF
no factor from 2^69 to 2^70
2017-11-20ramgeisNF
no factor from 2^68 to 2^69
2014-04-21NesowaNF
no factor from 2^67 to 2^68
2014-04-21NesowaNF
no factor from 2^66 to 2^67