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

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MnStatusDetails
1886021Factored
FactorDigitsBitsDate
125966483972060160234846012683.42020-06-25 15:29:57
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 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)David Linton0F09DFED072527320
Verified (Factored)1999-01-02The Prime Hunters0F09DFED07252732329552
Verified (Factored)2015-07-10MadPoo0F09DFED07252732916291
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-06-25riccardo uberti607D4B56D6EBD9561105186553
Verified2020-06-26marssystems607D4B56D6EBD9561130210653
History
DateUserTypeResult
2020-06-26marssystemsC-PRP
M1886021/12596648397206016023484601 : 607D4B56D6EBD956
PRP: Verified
PRP without proof (not generated)
2020-06-25riccardo ubertiC-PRP
M1886021/12596648397206016023484601 : 607D4B56D6EBD956
PRP: Verified
PRP without proof (not generated)
2020-06-25debrouxlF-ECM
Factor: 12596648397206016023484601 / (ECM curve 3, B1=50000, B2=5000000)
2019-06-24TJAOINF
no factor from 2^67 to 2^68
2018-05-28TJAOINF
no factor from 2^66 to 2^67
2018-05-02JossNF-PM1
B1=3095866, B2=188602100, E=12
2018-03-13JossNF-PM1
B1=3095866, B2=123834640, E=12
2018-02-16JossNF-PM1
B1=3095866, B2=61917320, E=12
2017-07-30JossNF-PM1
B1=3095866, B2=30958660, E=12
2017-07-20JossNF-PM1
B1=2579889, B2=25798890, E=12
2017-07-20JossNF-PM1
B1=2149908, B2=21499080, E=12
2017-07-05JossNF-PM1
B1=1791590, B2=17915900, E=12
2017-06-19JossNF-PM1
B1=1492992, B2=26873856, E=12
2017-03-01JossNF-PM1
B1=1244160, B2=12441600, E=12
2017-01-21JossNF-PM1
B1=1036800
2016-12-29JossNF-PM1
B1=864000
2016-12-23JossNF-PM1
B1=720000
2016-11-03JossNF-PM1
B1=600000
2016-10-09JossNF-PM1
B1=500000, B2=50000000, E=12
2016-10-07JossNF-PM1
B1=500000, B2=19800000, E=6
2016-09-22JossNF-PM1
B1=500000, B2=16500000, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-10-07Bruno VictalNF-PM1
B1=500000, B2=15000000, E=12
2015-09-13ramgeisNF
no factor from 2^65 to 2^66
2015-07-10MadPooC-LL
0F09DFED07252732
2015-05-10snme2pm1NF
no factor from 2^64 to 2^65
2015-05-10snme2pm1NF
no factor from 2^63 to 2^64
2012-01-17markrNF-PM1
B1=275000, B2=6000000, E=12
2011-03-08GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-01Architects CubedNF
no factor from 2^60 to 2^61