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
981637Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 268
TF target 244
TF below 2^97 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 50000000
B2 = 1263691439010
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000225 / 1566
Estimated T-Level: 30.7 ⓘ
LL
StatusDateUserResidueShift
VerifiedAlex and Nick Myrman541E0
VerifiedDavid Slowinski141E0
VerifiedPaul Victor NovareseCDDD76878E24541E0
VerifiedThe Grebelius FamilyCDDD76878E24541E0
Verified2015-04-11MadPooCDDD76878E24541E701004
History
DateUserTypeResult
2022-11-10masserNF-PP1
Start=2/7, B1=4000000, B2=172000000
2022-11-10masserNF-PP1
Start=6/5, B1=2000000, B2=74000000
2022-11-08masserNF-PP1
Start=149/11, B1=1000000, B2=32000000
2022-10-06axnNF-PM1
B1=50000000, B2=1263691439010
2021-11-12YxinityNF
no factor from 2^67 to 2^68
2018-12-15lycornNF
no factor from 2^66 to 2^67
2018-03-11BloodERazorNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-09-22snme2pm1NF
no factor from 2^64 to 2^65
2015-08-30Gordon SpenceNF
no factor from 2^63 to 2^64
2015-08-27Gordon SpenceNF
no factor from 2^62 to 2^63
2015-04-11MadPooC-LL
CDDD76878E24541E
2014-04-16alpertronNF-PM1
B1=10000000, B2=500000000, E=12
2014-01-21lycornNF
no factor from 2^61 to 2^62
2013-10-11David CampeauNF-PM1
B1=830000, B2=24900000, E=12
2012-02-06JossNF-PM1
B1=680607
2011-06-16JossNF-PM1
B1=400000
2011-06-01JossNF-PM1
B1=200000
2010-05-14Architects CubedNF
no factor from 2^60 to 2^61