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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Exponent Range:










MnStatusDetails
3280229Factored
FactorDigitsBitsDate
79688029742779453817668080492892.72022-01-22 20:55:34
ECM
DigitsB1Curves
255000072 / 280
Estimated T-Level: 21.3
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
BadAllen Harris6FECCA47FAB950DF0
Verified (Factored)George WoltmanD459077A6BB15A092319721
Verified (Factored)1999-06-06Goede Schueler/Christoph SteinbeckD459077A6BB15A092426579
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2022-01-29LaurVA8B3823EBF40C2E0185400853
History
DateUserTypeResult
2022-09-12JossNF-PM1
B1=1000000, B2=241152450
2022-03-24JossNF-PM1
B1=1000000, B2=134316000
2022-01-29curtiscCERT
PRP Certification
Proof certified good
2022-01-29LaurVC-PRP
M3280229/7968802974277945381766808049 : A8B3823EBF40C2E0
PRP proof power = 7
PRP: Verified
Proof certified good
2022-01-22daveward2005F-ECM
Factor: 7968802974277945381766808049 / (ECM curve 7, B1=50000, B2=5000000, Sigma=2853108831409738)
2022-01-17TJAOINF
no factor from 2^69 to 2^70
2021-08-02MadPooNF
no factor from 2^68 to 2^69
2021-02-13mikrNF-PM1
B1=4000000, B2=150000000, E=12
2018-12-03TJAOINF
no factor from 2^67 to 2^68
2018-08-11JossNF-PM1
B1=410000, B2=4100000
2018-08-08JossNF-PM1
B1=410000, B2=2050000
2018-08-08JossNF-PM1
B1=410000, B2=1640000
2018-08-07JossNF-PM1
B1=410000, B2=1230000
2018-08-06JossNF-PM1
B1=410000, B2=820000
2017-04-05Gordon SpenceNF
no factor from 2^66 to 2^67
2017-02-04JossNF-PM1
B1=198720
2017-01-29JossNF-PM1
B1=165600
2017-01-20Squeeky_SquirrelNF-PM1
B1=205000, B2=5893750, E=12
2017-01-11JossNF-PM1
B1=138000
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-06-29ThaNF
no factor from 2^65 to 2^66
2013-09-06Squeeky_SquirrelNF-PM1
B1=115000, B2=2616250, E=6
2012-11-25lycornNF
no factor from 2^62 to 2^65
2011-10-02markrNF
no factor from 2^61 to 2^62
2011-09-21USAFSSNF-PM1
B1=60000, B2=1065000, E=6
2009-07-09Carsten KossendeyNF-PM1
B1=15000, B2=191250
2009-04-03S485122NF
no factor from 2^60 to 2^61