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

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MnStatusDetails
3226147Factored
FactorDigitsBitsDate
64533746139051935801532272.52020-12-26 00:59:03
ECM
DigitsB1Curves
255000019 / 280
Estimated T-Level: 20.3
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Robert Friberg26D6B74ED57AADCE0
Verified (Factored)1999-07-04Marcello Viti26D6B74ED57AADCE2753845
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-12-27Niels_Mache_Nextcloud79C0B344C7329EA61256669953
History
DateUserTypeResult
2022-09-07JossNF-PM1
B1=1072614, B2=226749600
2022-01-24JossNF-PM1
B1=1072614, B2=119912100
2021-02-22JossNF
no factor from 2^66 to 2^67
2021-02-21JossNF
no factor from 2^65 to 2^66
2021-01-18JossNF-PM1
B1=408208, B2=3226147, E=6
2020-12-27curtiscCERT
PRP Certification
Proof certified good
2020-12-27Niels_Mache_NextcloudC-PRP
M3226147/6453374613905193580153 : 79C0B344C7329EA6
PRP proof power = 7
PRP: Verified
Proof certified good
2020-12-26daveward2005F-ECM
Factor: 6453374613905193580153 / (ECM curve 4, B1=50000, B2=5000000, Sigma=2619190069487004)
2020-03-27mikrNF-PM1
B1=4000000, B2=150000000, E=12
2018-12-10TJAOINF
no factor from 2^67 to 2^68
2017-03-19Gordon SpenceNF
no factor from 2^66 to 2^67
2016-05-08JossNF-PM1
B1=378208, B2=6807744, E=6
2015-12-18Squeeky_SquirrelNF-PM1
B1=155000, B2=3952500, E=6
2015-06-24ThaNF
no factor from 2^65 to 2^66
2015-02-15VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-15VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-29JossNF-PM1
B1=99790
2014-06-09JossNF-PM1
B1=79895
2013-01-03dbaughNF
no factor from 2^62 to 2^63
2011-09-15markrNF
no factor from 2^61 to 2^62
2011-09-06USAFSSNF-PM1
B1=60000, B2=1035000, E=6
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=191250
2009-04-04S485122NF
no factor from 2^60 to 2^61