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
66923Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 266
TF target 244
TF below 2^133 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 3000000000
B2 = 299024451906180
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000002663 / 9201
Estimated T-Level: 41.4 ⓘ
LL
StatusDateUserResidueShift
VerifiedUnknown1E190
VerifiedRobert Clark977CA975BCC59E190
VerifiedBrian J. Beesley977CA975BCC59E190
Verified2015-04-11MadPoo977CA975BCC59E192015
History
DateUserTypeResult
2025-05-20JossNF-PM1
B1=22000000, B2=397353416460
2022-10-18George WoltmanNF-PM1
B1=3000000000, B2=299024451906180
2022-10-16George WoltmanNF-PM1
B1=3000000000
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=154/37, B1=2500000, B2=85000000
2021-03-30Ruslan BorisovNF
no factor from 2^65 to 2^66
2019-02-15YxinityNF
no factor from 2^64 to 2^65
2019-02-15YxinityNF
no factor from 2^64 to 2^65
2018-01-01YxinityNF
no factor from 2^63 to 2^64
2018-01-01YxinityNF
no factor from 2^63 to 2^64
2016-04-08Sid & AndyNF
no factor from 2^62 to 2^63
2016-02-23LaurVNF
no factor from 2^58 to 2^59
2016-02-23LaurVNF
no factor from 2^57 to 2^58
2015-04-11MadPooC-LL
977CA975BCC59E19
2014-12-22Sid & AndyNF
no factor from 2^61 to 2^62
2014-09-03James HintzNF-PM1
B1=1000000000, B2=100000000000, E=12
2013-11-29LaurVNF
no factor from 2^60 to 2^61
2012-06-02alpertronNF-PM1
B1=100000000, B2=2000000000, E=12
2009-01-23Sturle SundeNF
no factor from 2^59 to 2^60