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

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MnStatusDetails
3051017Factored
FactorDigitsBitsDate
8225090682263736149013132479.42020-10-14 18:06:19
ECM
DigitsB1Curves
255000017 / 280
Estimated T-Level: 20.3
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Bad1998-02-08William JelsmaDFF600CD8C6D23730
Verified (Factored)1999-10-15Luisma MorenoD7E0AE933836D62E794515
Verified (Factored)1999-12-30Laurie A. RileyD7E0AE933836D62E2161781
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-10-15tottenhoff9C1306D8BE3465D01232397753
Verified2020-10-16kutens9C1306D8BE3465D01224563153
History
DateUserTypeResult
2022-09-07JossNF-PM1
B1=1055100, B2=226749600
2022-01-23JossNF-PM1
B1=1055100, B2=119912100
2021-01-16JossNF-PM1
B1=305101, B2=3051017, E=6
2021-01-14JossNF-PM1
B1=305101
2020-10-16curtiscCERT
PRP Certification
Proof certified good
2020-10-16kutensC-PRP
M3051017/822509068226373614901313 : 9C1306D8BE3465D0
PRP proof power = 7
PRP: Verified
Proof certified good
2020-10-15tottenhoffC-PRP
M3051017/822509068226373614901313 : 9C1306D8BE3465D0
PRP: Verified
PRP without proof (not generated)
2020-10-14mnd9F-ECM
Factor: 822509068226373614901313 / (ECM curve 2, B1=50000, B2=5000000, Sigma=7325573509026528)
2018-07-25ramgeisNF
no factor from 2^67 to 2^68
2017-09-28mikrNF-PM1
B1=3000000, B2=100000000, E=12
2017-05-06Gordon SpenceNF
no factor from 2^66 to 2^67
2016-03-16Squeeky_SquirrelNF-PM1
B1=205000, B2=5688750, E=12
2015-06-06ThaNF
no factor from 2^65 to 2^66
2015-02-07VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-07VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2011-03-19Sid & AndyNF
no factor from 2^61 to 2^62
2010-10-04markrNF-PM1
B1=110000, B2=2447500, E=6
2009-02-13Sturle SundeNF
no factor from 2^60 to 2^61