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

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MnStatusDetails
1316899Factored
FactorDigitsBitsDate
15551534930530892792392270.42018-06-08 13:19:42
18652257374370685550092270.72014-06-11 07:03:17
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)Joel Armengaud65D22535F9C789AF0
Verified (Factored)Cornelius Caesar65D22535F9C789AF0
Verified (Factored)Brian J. Beesley65D22535F9C789AF127912
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-30Oliver Kruse7E1A313DFD7C0D7D1013
Verified (Factored)2017-10-23kkmrkkblmbrbk7E1A313DFD7C0D7D129953313
Verified2018-06-10Daniil TsarkovB5B40AD7EFCC0DB8282116153
Verified2018-06-15Gabriel LignelliB5B40AD7EFCC0DB8241875753
P-1 factors
DateFactorB1B2
2014-06-1118652257374370685550094081679151022134
History
DateUserTypeResult
2022-03-07LordJuliusNF
no factor from 2^58 to 2^60
2018-06-15Gabriel LignelliC-PRP
M1316899/1865225737437068555009/1555153493053089279239 : B5B40AD7EFCC0DB8
PRP: Verified
PRP without proof (not generated)
2018-06-10Daniil TsarkovC-PRP
M1316899/1555153493053089279239/1865225737437068555009 : B5B40AD7EFCC0DB8
PRP: Verified
PRP without proof (not generated)
2018-06-08TJAOIF-ECM
Factor: 1555153493053089279239 / (ECM curve 12, B1=50000, B2=5000000)
2017-10-23kkmrkkblmbrbkC-PRP
M1316899/1865225737437068555009 : 7E1A313DFD7C0D7D
PRP: Verified
PRP without proof (not generated)
2017-09-30Oliver KruseC-PRP
M1316899/1865225737437068555009 : 7E1A313DFD7C0D7D
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2014-06-11mikrF-PM1
Factor: 1865225737437068555009 / (P-1, B1=4081679, B2=151022134, E=12)
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2012-09-18AxelssonNF
no factor from 2^61 to 2^62
2009-02-14Sturle SundeNF
no factor from 2^60 to 2^61