Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
3050561Factored
FactorDigitsBitsDate
63893955175248670722712272.42020-10-14 05:54:00
ECM
DigitsB1Curves
255000016 / 280
Estimated T-Level: 20.3
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)kimon berlinD9BC9D6F5D4C63560
Verified (Factored)1999-08-22Randy NerwickD9BC9D6F5D4C63561337287
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-10-17Sébastien BROUCKEE17541AA327EE1B31270651553
Verified2020-10-20arnaudE17541AA327EE1B31174647253
History
DateUserTypeResult
2022-09-07JossNF-PM1
B1=1055056, B2=226749600
2022-01-23JossNF-PM1
B1=1055056, B2=119912100
2021-01-17JossNF-PM1
B1=305056, B2=3050561, E=6
2021-01-14JossNF-PM1
B1=305056
2020-10-20arnaudC-PRP
M3050561/6389395517524867072271 : E17541AA327EE1B3
PRP: Verified
PRP without proof (not generated)
2020-10-17Sébastien BROUCKEC-PRP
M3050561/6389395517524867072271 : E17541AA327EE1B3
PRP: Verified
PRP without proof (not generated)
2020-10-14mnd9F-ECM
Factor: 6389395517524867072271 / (ECM curve 1, B1=50000, B2=5000000, Sigma=4828359136735330)
2018-07-25ramgeisNF
no factor from 2^67 to 2^68
2017-09-26mikrNF-PM1
B1=3000000, B2=100000000, E=12
2017-05-06Gordon SpenceNF
no factor from 2^66 to 2^67
2016-03-15Squeeky_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
2011-03-18Sid & AndyNF
no factor from 2^61 to 2^62
2010-10-04markrNF-PM1
B1=110000, B2=2447500, E=6
2009-02-12Sturle SundeNF
no factor from 2^60 to 2^61