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

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MnStatusDetails
3060601Factored
FactorDigitsBitsDate
7272161352860964075106972479.32021-03-24 04:43:50
ECM
DigitsB1Curves
255000053 / 280
Estimated T-Level: 20.9
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Marcin Kowalczyk6301862A543DCF8F0
Verified (Factored)1999-11-17Victor Huang6301862A543DCF8F1402631
Verified (Factored)1999-12-23Jeremy Perkins6301862A543DCF8F513029
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-03-25rbanov20F71FDAE42605D61196075153
P-1 factors
DateFactorB1B2
2022-03-21727216135286096407510697324652821850521074
History
DateUserTypeResult
2022-03-21oodairaF-PM1
Factor: 727216135286096407510697 / (P-1, B1=32465282, B2=1850521074, E=12)
2022-02-06JossNF-PM1
B1=1000000, B2=119912100
2022-01-20JossNF
no factor from 2^67 to 2^68
2021-03-25curtiscCERT
PRP Certification
Proof certified good
2021-03-25rbanovC-PRP
M3060601/727216135286096407510697 : 20F71FDAE42605D6
PRP proof power = 7
PRP: Verified
Proof certified good
2021-03-24ZenzomaF-ECM
Factor: 727216135286096407510697 / (ECM curve 3, B1=50000, B2=5000000, Sigma=5693385555538080)
2018-07-30ramgeisNF
no factor from 2^67 to 2^68
2017-11-13mikrNF-PM1
B1=3000000, B2=100000000, E=12
2017-05-09Gordon SpenceNF
no factor from 2^66 to 2^67
2016-03-05Squeeky_SquirrelNF-PM1
B1=195000, B2=5411250, E=6
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
2011-10-06Sid & AndyNF
no factor from 2^61 to 2^62
2010-09-26markrNF-PM1
B1=110000, B2=2447500, E=6
2009-02-13Sturle SundeNF
no factor from 2^60 to 2^61