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
986191Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 268
TF target 244
TF below 2^120 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 50000000
B2 = 1263691439010
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000002447 / 4588
Estimated T-Level: 37.7 ⓘ
LL
StatusDateUserResidueShift
VerifiedDavid Slowinski1BD70
VerifiedPaul Victor Novarese9928ABEFD2E39BD70
VerifiedBen Reubenstein9928ABEFD2E39BD70
Verified2015-04-11MadPoo9928ABEFD2E39BD7901057
History
DateUserTypeResult
2022-11-11masserNF-PP1
Start=2/7, B1=4000000, B2=172000000
2022-11-10masserNF-PP1
Start=6/5, B1=2000000, B2=74000000
2022-11-08masserNF-PP1
Start=145/29, B1=1000000, B2=32000000
2022-10-09axnNF-PM1
B1=50000000, B2=1263691439010
2021-10-29YxinityNF
no factor from 2^67 to 2^68
2018-12-11lycornNF
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
2015-04-29snme2pm1NF
no factor from 2^64 to 2^65
2015-04-29snme2pm1NF
no factor from 2^63 to 2^64
2015-04-11MadPooC-LL
9928ABEFD2E39BD7
2014-04-18alpertronNF-PM1
B1=10000000, B2=500000000, E=12
2013-12-08Jerry HallettNF
no factor from 2^62 to 2^63
2013-12-08Jerry HallettNF
no factor from 2^61 to 2^62
2013-10-14David CampeauNF-PM1
B1=825000, B2=24750000, E=12
2012-02-06JossNF-PM1
B1=676534
2011-06-16JossNF-PM1
B1=400000
2011-05-31JossNF-PM1
B1=200000
2010-05-13Architects CubedNF
no factor from 2^60 to 2^61