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

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MnStatusDetails
2738453Factored
FactorDigitsBitsDate
214617160512641152816732374.22017-08-17 07:06:30
ECM
DigitsB1Curves
255000022 / 280
Estimated T-Level: 20.4
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Michael B. Clark8002F65F13FF13970
Verified (Factored)1999-10-21Jim Evans8002F65F13FF13972653436
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28alpertronB62A17226B5A09C61013
Verified2017-11-15Oliver KruseB62A17226B5A09C61261792213
History
DateUserTypeResult
2017-11-15Oliver KruseC-PRP
M2738453/21461716051264115281673 : B62A17226B5A09C6
PRP: Verified
PRP without proof (not generated)
2017-09-28alpertronC-PRP
M2738453/21461716051264115281673 : B62A17226B5A09C6
PRP: Verified
PRP without proof (not generated)
2017-08-17bamF-ECM
Factor: 21461716051264115281673 / (ECM curve 1, B1=50000, B2=5000000)
2016-10-26mikrNF-PM1
B1=2700000, B2=84000000, E=12
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-03ramgeisNF
no factor from 2^65 to 2^66
2015-04-13VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-13VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-04-10Grant McCrackenNF
no factor from 2^61 to 2^62
2011-04-27James HeinrichNF-PM1
B1=185000, B2=4625000, E=6
2011-01-20JossNF-PM1
B1=50000
2010-12-29JossNF-PM1
B1=30000
2010-12-19JossNF-PM1
B1=20000
2009-01-27Sturle SundeNF
no factor from 2^60 to 2^61