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
4021889Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 265
P-1
B1 = 36197002
B2 = 611514523620
ECM
DigitsB1Curves
2550000149 / 280
Estimated T-Level: 22.7 ⓘ
LL
StatusDateUserResidueShift
VerifiedPaul Traue Jr.FA803A93B03A08E10
Verified1999-09-22Merl HedgpethFA803A93B03A08E1119489
History
DateUserTypeResult
2025-03-27linamentNF
no factor from 2^71 to 2^72
2024-10-18yuriy_5-1NF-PM1
B1=36197002, B2=611514523620
2022-06-15DRobinsonPENF-PM1
B1=6200000, B2=33497413950
2022-03-26mikrNF
no factor from 2^70 to 2^71
2021-06-07ATHNF-PP1
Start=2/7, B1=2500000, B2=170000000
2020-06-03GdSNF-PM1
B1=2396240, B2=59905988, E=12
2019-10-24mikrNF
no factor from 2^69 to 2^70
2019-10-24mikrNF
no factor from 2^68 to 2^69
2018-10-02mikrNF
no factor from 2^67 to 2^68
2016-09-04kkmrkkblmbrbkNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^61 to 2^63
2015-05-19snme2pm1NF
no factor from 2^65 to 2^66
2015-01-04NesowaNF-PM1
B1=225000, B2=4556250, E=6
2013-10-21David CampeauNF
no factor from 2^64 to 2^65
2013-08-03JayderNF
no factor from 2^63 to 2^64
2013-06-23Squeeky_SquirrelNF-PM1
B1=120000, B2=2280000, E=6
2009-11-24USAFSSNF-PM1
B1=40000, B2=610000, E=4
2009-11-11GrunwalderGIMPNF
no factor from 2^1 to 2^63