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

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Exponent Range:










MnStatusDetails
1814641Factored
FactorDigitsBitsDate
271857181893625284969592374.52021-02-19 17:13:19
625442926418128786356312375.72016-05-22 18:34:28
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)Tom CageA03A274A8631A09F0
Verified (Factored)1999-05-16Artur MazurA03A274A8631A09F186729
Verified (Factored)2015-06-27MadPooA03A274A8631A09F397802
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-03Oliver KruseF013680C920968FA1013
Verified (Factored)2017-11-06bayanneF013680C920968FA1153776513
Verified2021-02-19ViliamF961E88B98F8EFD9B251011053
History
DateUserTypeResult
2021-02-19Ben DeloCERT
PRP Certification
Proof certified good
2021-02-19ViliamFC-PRP
M1814641/62544292641812878635631/27185718189362528496959 : 961E88B98F8EFD9B
PRP proof power = 7
PRP: Verified
Proof certified good
2021-02-19TJAOIF-ECM
Factor: 27185718189362528496959 / (ECM curve 5, B1=50000, B2=6600000)
2017-11-06bayanneC-PRP
M1814641/62544292641812878635631 : F013680C920968FA
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1814641/62544292641812878635631 : F013680C920968FA
PRP: Verified (Factored)
PRP without proof (not generated)
2016-05-22bamF-ECM
Factor: 62544292641812878635631 / (ECM curve 3, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-09-02ramgeisNF
no factor from 2^65 to 2^66
2015-06-27MadPooC-LL
A03A274A8631A09F
2015-05-21mikrNF-PM1
B1=2780000, B2=91760000, E=12
2015-04-22snme2pm1NF
no factor from 2^64 to 2^65
2015-04-22snme2pm1NF
no factor from 2^63 to 2^64
2014-12-02JossNF-PM1
B1=201812
2014-09-10JossNF-PM1
B1=166442
2011-01-21GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-18Architects CubedNF
no factor from 2^60 to 2^61