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
2021849Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 270
TF target 262
TF below 2^81 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 14500000
B2 = 47782835100
ECM
DigitsB1Curves
2550000280 / 280
30250000126 / 640
Estimated T-Level: 26.0 ⓘ
LL
StatusDateUserResidueShift
VerifiedJeff Hardy2BCA9C2A08291EBF0
Verified1999-01-29Dave Clouser2BCA9C2A08291EBF251596
Verified2016-07-15Mark Rose2BCA9C2A08291EBF327280
History
DateUserTypeResult
2023-08-13Sid & AndyNF-PM1
B1=14500000, B2=47782835100
2023-06-19JossNF-PM1
B1=1000000, B2=7707674520
2023-02-08JossNF-PM1
B1=1000000, B2=1545766950
2022-12-24Architects CubedNF
no factor from 2^69 to 2^70
2021-09-02TJAOINF
no factor from 2^68 to 2^69
2020-10-16Bruno VictalNF-PM1
B1=10000000, B2=300000000
2019-03-18chuenkitNF
no factor from 2^67 to 2^68
2019-03-05mikrNF-PM1
B1=4000000, B2=200000000, E=12
2016-07-15Mark RoseC-LL
2BCA9C2A08291EBF
2016-07-02Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-10-13omylistNF
no factor from 2^65 to 2^66
2015-04-10VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-10VictordeHollanderNF
no factor from 2^63 to 2^64
2013-10-30David CampeauNF-PM1
B1=580000, B2=15080000, E=12
2013-02-11dbaughNF
no factor from 2^62 to 2^63
2012-02-05Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-10JossNF-PM1
B1=202184
2009-01-03Sturle SundeNF
no factor from 2^60 to 2^61