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
327599Factored
FactorDigitsBitsDate
43705443867829906141671432581.92019-03-29 11:25:31
ECM
DigitsB1Curves
2550000280 / 280
30250000386 / 640
Estimated T-Level: 28.0 ⓘ
TF below 2^88 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski6D410
Verified (Factored)Unknown6D410
Verified (Factored)Guillermo Ballester ValorF58985448E98ED410
Verified (Factored)Klaus KastensF58985448E98ED410
Verified (Factored)Eivind TrielF58985448E98ED41325009
Verified (Factored)2016-06-01MadPooF58985448E98ED41301785
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-03-29ATHFD83BAADAFA91E2217273653
Verified2019-03-30kkmrkkblmbrbkFD83BAADAFA91E2218073953
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2019-03-30kkmrkkblmbrbkC-PRP
M327599/4370544386782990614167143 : FD83BAADAFA91E22
PRP: Verified
PRP without proof (small exponent)
2019-03-29ATHC-PRP
M327599/4370544386782990614167143 : FD83BAADAFA91E22
PRP: Verified
PRP without proof (small exponent)
2019-03-29alexF-ECM
Factor: 4370544386782990614167143 / (ECM curve 61, B1=250000, B2=25000000, Sigma=2251370260594305)
2018-01-27Gordon SpenceNF
no factor from 2^64 to 2^65
2016-07-12mikrNF-PM1
B1=60000000, B2=3000000000, E=12
2016-06-01MadPooC-LL
F58985448E98ED41
2015-12-13Gordon SpenceNF
no factor from 2^63 to 2^64
2015-12-13Gordon SpenceNF
no factor from 2^62 to 2^63
2015-07-22NRNF
no factor from 2^61 to 2^62
2013-03-18Sid & AndyNF
no factor from 2^60 to 2^61
2012-01-15alpertronNF-PM1
B1=10000000, B2=200000000, E=12
2011-08-06JossNF-PM1
B1=1412006
2009-01-25Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-30Sturle SundeNF
no factor from 2^58 to 2^59