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

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MnStatusDetails
3655937Factored
FactorDigitsBitsDate
1958590298302179649924012477.42021-09-06 21:26:44
ECM
DigitsB1Curves
255000023 / 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)David NewhallD24D83C44AE8DAA50
Verified (Factored)1999-09-14Alexey GuzeevD24D83C44AE8DAA51651977
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-09-12Yizhe HuangAE1B8B0AAB8ED2BA122958853
History
DateUserTypeResult
2022-05-24JossNF-PM1
B1=100000, B2=130364850
2022-03-04JossNF-PM1
B1=90000
2021-09-12curtiscCERT
PRP Certification
Proof certified good
2021-09-12Yizhe HuangC-PRP
M3655937/195859029830217964992401 : AE1B8B0AAB8ED2BA
PRP proof power = 7
PRP: Verified
Proof certified good
2021-09-06daveward2005F-ECM
Factor: 195859029830217964992401 / (ECM curve 1, B1=50000, B2=5000000, Sigma=2027246397419881)
2020-11-19axnNF
no factor from 2^69 to 2^70
2020-11-09axnNF
no factor from 2^68 to 2^69
2020-09-15axnNF-PM1
B1=30000000, B2=600000000, E=12
2019-01-21TJAOINF
no factor from 2^67 to 2^68
2017-03-11Squeeky_SquirrelNF-PM1
B1=230000, B2=6785000, E=12
2017-03-07JossNF-PM1
B1=241228, B2=2412280, E=6
2017-01-29JossNF-PM1
B1=167520
2016-12-30Gordon SpenceNF
no factor from 2^66 to 2^67
2016-12-29JossNF-PM1
B1=129600
2016-06-14JossNF-PM1
B1=108000, B2=3285000, E=6
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-10-20ramgeisNF
no factor from 2^65 to 2^66
2015-01-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-23VictordeHollanderNF
no factor from 2^63 to 2^64
2012-06-05GrunwalderGIMPNF
no factor from 2^1 to 2^63
2012-01-31Squeeky_SquirrelNF-PM1
B1=90000, B2=1642500, E=6
2011-05-11markrNF
no factor from 2^61 to 2^62
2009-07-07Carsten KossendeyNF-PM1
B1=20000, B2=250000
2009-03-09S485122NF
no factor from 2^60 to 2^61