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
6104261Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 266
P-1
B1 = 2203607
B2 = 4248254010
ECM
DigitsB1Curves
255000095 / 280
Estimated T-Level: 21.7 ⓘ
LL
StatusDateUserResidueShift
VerifiedShiau Khee Tang955AF4B53FAC2D760
Verified2000-12-21Marc Getty / Phil Fizur955AF4B53FAC2D763046304
History
DateUserTypeResult
2024-03-31takahashiNF
no factor from 2^72 to 2^73
2022-01-04LaurVNF-PM1
B1=2203607, B2=4248254010
2021-10-15SRBaseNF
no factor from 2^71 to 2^72
2020-08-02takahashiNF
no factor from 2^70 to 2^71
2020-07-09takahashiNF
no factor from 2^69 to 2^70
2020-03-14takahashiNF
no factor from 2^68 to 2^69
2019-06-22takahashiNF-PM1
B1=400000, B2=7500000, E=12
2018-05-30ramgeisNF
no factor from 2^67 to 2^68
2016-03-16Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-10-05Bruno VictalNF
no factor from 2^65 to 2^66
2014-09-17monstNF
no factor from 2^64 to 2^65
2014-09-10NesowaNF
no factor from 2^63 to 2^64
2011-04-12markrNF-PM1
B1=115000, B2=2213750, E=6