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
81239Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 266
TF target 244
TF below 2^132 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 1000000000
B2 = 20461169718990
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000002111 / 9201
Estimated T-Level: 41.1 ⓘ
LL
StatusDateUserResidueShift
VerifiedUnknown22F60
VerifiedRobert Clark30F91B602DA122F60
VerifiedBrian J. Beesley30F91B602DA122F60
Verified2015-04-11MadPoo30F91B602DA122F620257
History
DateUserTypeResult
2022-09-25masserNF-PP1
Start=2/7, B1=10000000, B2=500000000
2022-09-25masserNF-PP1
Start=6/5, B1=5000000, B2=210000000
2022-09-25masserNF-PP1
Start=167/13, B1=2500000, B2=85000000
2022-01-11George WoltmanNF-PM1
B1=1000000000, B2=20461169718990
2021-12-06George WoltmanNF-PM1
B1=300000000, B2=5100926130300
2020-10-10YxinityNF
no factor from 2^65 to 2^66
2020-10-09YxinityNF
no factor from 2^65 to 2^66
2018-12-15YxinityNF
no factor from 2^64 to 2^65
2018-12-14YxinityNF
no factor from 2^64 to 2^65
2017-01-11snme2pm1NF
no factor from 2^63 to 2^64
2016-02-23LaurVNF
no factor from 2^58 to 2^59
2016-02-23LaurVNF
no factor from 2^57 to 2^58
2015-12-27snme2pm1NF
no factor from 2^62 to 2^63
2015-04-11MadPooC-LL
30F91B602DA122F6
2015-04-03Sid & AndyNF
no factor from 2^61 to 2^62
2013-10-28lycornNF
no factor from 2^60 to 2^61
2012-08-29LaurVNF-PM1
B1=100000000, B2=2000000000, E=12
2009-01-05Sturle SundeNF
no factor from 2^59 to 2^60