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

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MnStatusDetails
1318729Factored
FactorDigitsBitsDate
431999995694706074590492375.22018-06-08 13:19:52
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Robert ClarkFC02E421100EC71D0
Verified (Factored)Simon BurgeFC02E421100EC71D0
Verified (Factored)1998-11-07Bradford BrownFC02E421100EC71D35142
Verified (Factored)2016-06-02MadPooFC02E421100EC71D459272
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2018-06-10Daniil Tsarkov71F47AF3BCD734751102276253
Verified2018-06-15Gabriel Lignelli71F47AF3BCD73475163944353
History
DateUserTypeResult
2018-06-15Gabriel LignelliC-PRP
M1318729/43199999569470607459049 : 71F47AF3BCD73475
PRP: Verified
PRP without proof (not generated)
2018-06-10Daniil TsarkovC-PRP
M1318729/43199999569470607459049 : 71F47AF3BCD73475
PRP: Verified
PRP without proof (not generated)
2018-06-08TJAOIF-ECM
Factor: 43199999569470607459049 / (ECM curve 52, B1=50000, B2=5000000)
2016-06-02MadPooC-LL
FC02E421100EC71D
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-10-02ramgeisNF
no factor from 2^65 to 2^66
2015-04-10snme2pm1NF
no factor from 2^64 to 2^65
2015-04-10snme2pm1NF
no factor from 2^63 to 2^64
2014-06-14mikrNF-PM1
B1=4081679, B2=151022134, E=12
2013-01-10dbaughNF
no factor from 2^62 to 2^63
2012-09-18AxelssonNF
no factor from 2^61 to 2^62
2009-02-15Sturle SundeNF
no factor from 2^60 to 2^61