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

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MnStatusDetails
2470121Factored
FactorDigitsBitsDate
21186081979632232220450472580.82020-10-29 15:52:01
ECM
DigitsB1Curves
255000085 / 280
Estimated T-Level: 21.5 ⓘ
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Don Weber5FE585519AF7F7500
Verified (Factored)1999-09-30Brad C. Karthauser5FE585519AF7F7501349870
Verified (Factored)2018-05-28kkmrkkblmbrbk5FE585519AF7F7501558835
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-11-01Sébastien BROUCKE6935DB46BE9F62811206472553
Verified2020-11-02kutens6935DB46BE9F62811246525753
History
DateUserTypeResult
2020-11-02DobriCERT
PRP Certification
Proof certified good
2020-11-02kutensC-PRP
M2470121/2118608197963223222045047 : 6935DB46BE9F6281
PRP proof power = 7
PRP: Verified
Proof certified good
2020-11-01Sébastien BROUCKEC-PRP
M2470121/2118608197963223222045047 : 6935DB46BE9F6281
PRP: Verified
PRP without proof (not generated)
2020-10-29Chang Chia-TcheF-ECM
Factor: 2118608197963223222045047 / (ECM curve 2, B1=50000, B2=5000000, Sigma=6527089589428443)
2019-06-10TJAOINF
no factor from 2^67 to 2^68
2019-04-24Sid & AndyNF-PM1
B1=6000000, B2=180000000, E=12
2018-05-28kkmrkkblmbrbkC-LL
5FE585519AF7F750
2017-07-22Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-10-27ramgeisNF
no factor from 2^65 to 2^66
2015-03-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-03VictordeHollanderNF
no factor from 2^63 to 2^64
2013-10-23David CampeauNF-PM1
B1=590000, B2=15930000, E=12
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-08-10Grant McCrackenNF
no factor from 2^61 to 2^62
2010-12-02JossNF-PM1
B1=247012
2010-11-19JossNF-PM1
B1=20000
2009-01-14Sturle SundeNF
no factor from 2^60 to 2^61