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

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MnStatusDetails
1447777Factored
FactorDigitsBitsDate
198773282772250276445772374.12015-05-06 12:28:13
2724833840808592822663032477.92015-05-09 13:52:04
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John Platt672C0937C8717A6E0
Verified (Factored)1999-01-17Herman Chen672C0937C8717A6E286540
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-05Oliver KruseCE427A4CAD6575972013
Verified2017-10-27kkmrkkblmbrbkCE427A4CAD657597276358813
P-1 factors
DateFactorB1B2
2015-05-09272483384080859282266303200000060000000
History
DateUserTypeResult
2017-10-27kkmrkkblmbrbkC-PRP
M1447777/19877328277225027644577/272483384080859282266303 : CE427A4CAD657597
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1447777/19877328277225027644577/272483384080859282266303 : CE427A4CAD657597
PRP: Verified
PRP without proof (not generated)
2017-10-01Oliver KruseC-PRP
M1447777/19877328277225027644577/272483384080859282266303 : CE427A4CAD657597
PRP without proof (not generated)
2015-05-09alpertronF-PM1
Factor: 272483384080859282266303 / (P-1, B1=2000000, B2=60000000, E=12)
2015-05-06Chang Chia-TcheF-ECM
Factor: 19877328277225027644577 / (ECM curve 3, B1=50000, B2=5000000)
2015-05-01JossNF-PM1
B1=843492
2015-04-08JossNF-PM1
B1=697101
2015-03-24snme2pm1NF
no factor from 2^64 to 2^65
2015-03-24snme2pm1NF
no factor from 2^63 to 2^64
2015-03-12JossNF-PM1
B1=576118
2015-03-03JossNF-PM1
B1=523744
2015-03-02JossNF-PM1
B1=476131
2015-02-13JossNF-PM1
B1=393498
2015-01-30JossNF-PM1
B1=357726
2015-01-28JossNF-PM1
B1=325206
2014-11-17JossNF-PM1
B1=244333
2011-05-07GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-07-08Rob_DeeNF-PM1
B1=200000, B2=5000000, E=6
2010-07-07Rob_DeeNF-PM1
B1=200000, B2=4000000, E=6
2010-07-06Rob_DeeNF-PM1
B1=200000, B2=3000000, E=6
2010-07-05Rob_DeeNF-PM1
B1=200000, B2=2000000, E=6
2010-07-04Rob_DeeNF-PM1
B1=200000, B2=1000000, E=6
2010-07-03Rob_DeeNF-PM1
B1=200000, B2=300000
2010-07-02Rob_DeeNF-PM1
B1=100000, B2=200000
2010-05-10Architects CubedNF
no factor from 2^60 to 2^61