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
3998413Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 265
TF below 2^80 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10000000
B2 = 20173583430
ECM
DigitsB1Curves
2550000280 / 280
3025000060 / 640
Estimated T-Level: 25.5 ⓘ
LL
StatusDateUserResidueShift
Verified1998-06-28Calkins885C2CED5DB37C6A0
Bad2000-01-12Patxi Herrán639AD96327648D9978703
Verified2001-03-18Robin Tremblay885C2CED5DB37C6A2018935
Verified2001-03-18Scott Kurowski885C2CED5DB37C6A3042660
History
DateUserTypeResult
2025-05-05Kyle AskineNF
no factor from 2^71 to 2^72
2025-02-12JossNF-PM1
B1=10000000, B2=20173583430
2024-04-18JossNF-PM1
B1=10000000, B2=10002782790
2022-04-13KingNF-PM1
B1=5000000, B2=2005315410
2021-06-03-Anonymous-NF
no factor from 2^70 to 2^71
2021-05-21axnNF
no factor from 2^69 to 2^70
2020-03-13TJAOINF
no factor from 2^68 to 2^69
2018-07-23TJAOINF
no factor from 2^67 to 2^68
2016-12-18Gordon SpenceNF
no factor from 2^66 to 2^67
2016-10-21Squeeky_SquirrelNF-PM1
B1=245000, B2=6860000, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-01-27ramgeisNF
no factor from 2^65 to 2^66
2015-08-17Squeeky_SquirrelNF-PM1
B1=190000, B2=4845000, E=6
2014-11-25JossNF-PM1
B1=86052
2013-10-08David CampeauNF
no factor from 2^64 to 2^65
2013-07-17JayderNF
no factor from 2^63 to 2^64
2012-02-29GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-09-13Squeeky_SquirrelNF-PM1
B1=70000, B2=1190000, E=6
2010-11-03Sid & AndyNF
no factor from 2^61 to 2^62