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
1273907TF
No factors below 268
TF target 260
TF below 2^81 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 25000000
B2 = 128546085360
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 640
Estimated T-Level: 25.8 ⓘ
LL
StatusDateUserResidueShift
VerifiedVincent J. Mooney471BED9FFF8926500
VerifiedSimon Burge471BED9FFF8926500
VerifiedBrian J. Beesley471BED9FFF892650833147
Verified2016-06-01MadPoo471BED9FFF892650647514
History
DateUserTypeResult
2022-05-14Sid & AndyNF-PM1
B1=25000000, B2=128546085360
2020-03-13Gordon SpenceNF
no factor from 2^67 to 2^68
2018-10-13JossNF-PM1
B1=1273907, B2=140129770, E=12
2018-09-12YxinityNF
no factor from 2^66 to 2^67
2018-05-03JossNF-PM1
B1=1273907, B2=127390700, E=12
2016-08-27Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-08-04Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-06-01MadPooC-LL
471BED9FFF892650
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-09-24ramgeisNF
no factor from 2^65 to 2^66
2015-04-11monstNF
no factor from 2^64 to 2^65
2015-04-10omylistNF
no factor from 2^63 to 2^64
2013-10-07David CampeauNF-PM1
B1=1195000, B2=34655000, E=12
2012-10-18dbaughNF
no factor from 2^62 to 2^63
2012-09-15AxelssonNF
no factor from 2^61 to 2^62
2009-02-18Sturle SundeNF
no factor from 2^60 to 2^61