Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
12281TF
No factors below 266
TF target 244
TF below 2^168 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 1000000000000
B2 = 1400160173312901000
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000015939 / 40830
Estimated T-Level: 52.0 ⓘ
LL
StatusDateUserResidueShift
VerifiedUnknown09690
VerifiedGeorge WoltmanF39F1808E5C189690
VerifiedBrian J. BeesleyF39F1808E5C189690
Verified2015-04-11MadPooF39F1808E5C189699089
History
DateUserTypeResult
2023-08-24masserNF-PP1
Start=6/5, B1=650000000, B2=116350000000
2023-08-11snme2pm1NF
no factor from 2^63 to 2^64
2023-07-09masserNF-PP1
Start=110/11, B1=650000000, B2=26000000000
2022-10-29-Anonymous-NF-PM1
B1=1000000000000, B2=1400160173312901000
2022-03-14-Anonymous-NF-PM1
B1=100000000000, B2=121047848166084840
2021-10-19Ruslan BorisovNF
no factor from 2^65 to 2^66
2021-05-09ATHNF-PP1
Start=2/7, B1=1000000000, B2=241000000000
2019-03-27Anton RepkoNF
no factor from 2^64 to 2^65
2018-11-06snme2pm1NF
no factor from 2^63 to 2^64
2018-07-03James HintzNF-PM1
B1=25971532008, B2=1947864900600, E=12
2016-10-19Sid & AndyNF
no factor from 2^62 to 2^63
2016-02-23LaurVNF
no factor from 2^57 to 2^58
2015-09-03Sid & AndyNF
no factor from 2^61 to 2^62
2015-04-11MadPooC-LL
F39F1808E5C18969
2013-01-29bcp19NF-PM1
B1=10000000000, B2=100000000000, E=12
2012-11-22bcp19NF
no factor from 2^60 to 2^61
2011-05-06-Anonymous-NF-PM1
B1=1000000000
2010-07-20George WoltmanNF
no factor from 2^59 to 2^60
2010-07-20George WoltmanNF
no factor from 2^58 to 2^59