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
28663Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 266
TF target 244
TF below 2^152 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 8000000000
B2 = 2253172624873170
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000007932 / 16550
Estimated T-Level: 47.4 ⓘ
LL
StatusDateUserResidueShift
VerifiedUnknown1D0B0
VerifiedGeorge Woltman855DAB2779681D0B0
VerifiedBrian J. Beesley855DAB2779681D0B0
Verified2015-04-11MadPoo855DAB2779681D0B14319
History
DateUserTypeResult
2023-08-23masserNF-PP1
Start=6/5, B1=250000000, B2=44750000000
2023-07-26masserNF-PM1
B1=8000000000, B2=2253172624873170
2023-07-07masserNF-PP1
Start=169/31, B1=250000000, B2=10000000000
2021-05-06ATHNF-PP1
Start=2/7, B1=500000000, B2=101500000000
2020-05-26YxinityNF
no factor from 2^65 to 2^66
2020-05-26YxinityNF
no factor from 2^65 to 2^66
2019-07-18YxinityNF
no factor from 2^64 to 2^65
2019-07-17YxinityNF
no factor from 2^64 to 2^65
2018-04-10YxinityNF
no factor from 2^63 to 2^64
2018-04-07YxinityNF
no factor from 2^63 to 2^64
2017-05-22mikrNF-PM1
B1=12000000000, B2=960000000000, E=12
2016-09-08Sid & AndyNF
no factor from 2^62 to 2^63
2016-02-23LaurVNF
no factor from 2^57 to 2^58
2015-04-11MadPooC-LL
855DAB2779681D0B
2013-11-07David CampeauNF-PM1
B1=204670000, B2=10642840000, E=12
2012-04-02bcp19NF
no factor from 2^61 to 2^62
2012-04-02bcp19NF
no factor from 2^60 to 2^61
2009-01-25Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-17Sturle SundeNF
no factor from 2^58 to 2^59