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

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MnStatusDetails
2241917Factored
FactorDigitsBitsDate
121982483646179814146872373.42020-08-14 19:12:07
ECM
DigitsB1Curves
255000097 / 280
Estimated T-Level: 21.7
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)nphanA78EB797B31441F30
Verified (Factored)1999-03-15Charles KyleA78EB797B31441F3596813
Verified (Factored)2018-04-21kkmrkkblmbrbkA78EB797B31441F3872385
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-08-14George Woltman9C4FD60173FD1BD3158398753
History
DateUserTypeResult
2020-08-14George WoltmanCERT
PRP Certification
Proof certified good
2020-08-14George WoltmanC-PRP
M2241917/12198248364617981414687 : 9C4FD60173FD1BD3
PRP proof power = 7
PRP: Verified
Proof certified good
2020-08-14MarkSF-ECM
Factor: 12198248364617981414687 / (ECM curve 1, B1=50000, B2=5000000, Sigma=1476084012685819)
2019-04-01TJAOINF
no factor from 2^67 to 2^68
2018-04-21kkmrkkblmbrbkC-LL
A78EB797B31441F3
2016-12-29Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 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=128629
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