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
7308817Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 267
P-1
B1 = 3300000
B2 = 8474534250
ECM
DigitsB1Curves
2550000160 / 280
Estimated T-Level: 22.9 ⓘ
LL
StatusDateUserResidueShift
Verified1999-06-15Marc Getty / Phil Fizur34CD23D5E3F50D4A1675766
Verified2002-09-14Ars Technica Team Prime Rib34CD23D5E3F50D4A522609
History
DateUserTypeResult
2023-02-02DRobinsonPENF-PM1
B1=3300000, B2=8474534250
2021-09-28SRBaseNF
no factor from 2^71 to 2^72
2021-08-11SRBaseNF
no factor from 2^70 to 2^71
2020-05-21GdSNF
no factor from 2^69 to 2^70
2020-05-21GdSNF
no factor from 2^68 to 2^69
2020-03-13GdSNF-PM1
B1=777023, B2=15540452, E=12
2020-03-03GdSNF-PM1
B1=310809, B2=6216181, E=12
2018-08-05ramgeisNF
no factor from 2^67 to 2^68
2016-10-01Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-21VictordeHollanderNF
no factor from 2^65 to 2^66
2013-11-18David CampeauNF
no factor from 2^64 to 2^65
2012-09-08Squeeky_SquirrelNF-PM1
B1=90000, B2=1620000, E=6
2012-04-04David CampeauNF
no factor from 2^63 to 2^64