Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2241389Factored
FactorDigitsBitsDate
147852110520547520876332373.62020-07-23 00:53:14
ECM
DigitsB1Curves
255000088 / 280
Estimated T-Level: 21.6 ⓘ
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)The Grebelius Family90DD37B3080FF4B50
Verified (Factored)1999-03-01Jörg Thomsen90DD37B3080FF4B5929671
Verified (Factored)2018-04-21kkmrkkblmbrbk90DD37B3080FF4B5723955
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-07-23pewA4F4F04D081F92A01102131253
Verified2020-08-05Chang Chia-TcheA4F4F04D081F92A0142777653
History
DateUserTypeResult
2020-08-05Chang Chia-TcheC-PRP
M2241389/14785211052054752087633 : A4F4F04D081F92A0
PRP: Verified
PRP without proof (not generated)
2020-07-23pewC-PRP
M2241389/14785211052054752087633 : A4F4F04D081F92A0
PRP: Verified
PRP without proof (not generated)
2020-07-23GANF-ECM
Factor: 14785211052054752087633 / (ECM curve 1, B1=50000, B2=5000000, Sigma=7437305021355518)
2019-04-01TJAOINF
no factor from 2^67 to 2^68
2018-04-21kkmrkkblmbrbkC-LL
90DD37B3080FF4B5
2016-12-29Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-01-17Alexander DubrovinNF-PM1
B1=2000000, B2=65000000, E=12
2015-12-03Alexander DubrovinNF-PM1
B1=1000000, B2=6000000, E=6
2015-10-26ramgeisNF
no factor from 2^65 to 2^66
2015-03-10VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-10VictordeHollanderNF
no factor from 2^63 to 2^64
2014-08-25-Anonymous-NF-PM1
B1=128636
2013-08-21David CampeauNF
no factor from 2^62 to 2^63
2012-05-03Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-07markrNF-PM1
B1=100000, B2=2050000, E=6
2010-11-10JossNF-PM1
B1=30000
2009-01-11Sturle SundeNF
no factor from 2^60 to 2^61