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

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Exponent Range:










MnStatusDetails
2372417Factored
FactorDigitsBitsDate
19476509185169546485212270.72020-04-04 12:34:08
ECM
DigitsB1Curves
255000041 / 280
Estimated T-Level: 20.7
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ethan O'Connor3242D340671515F80
Verified (Factored)1999-03-01Bjørn Roger Larsen3242D340671515F8321079
Verified (Factored)2018-05-13kkmrkkblmbrbk3242D340671515F81528248
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-04-05Christoph Zenger0D0EC2E2799FFA4D1179037953
Verified2020-04-05AbsolutXTR0D0EC2E2799FFA4D1127843353
History
DateUserTypeResult
2020-04-05AbsolutXTRC-PRP
M2372417/1947650918516954648521 : 0D0EC2E2799FFA4D
PRP: Verified
PRP without proof (not generated)
2020-04-05Christoph ZengerC-PRP
M2372417/1947650918516954648521 : 0D0EC2E2799FFA4D
PRP: Verified
PRP without proof (not generated)
2020-04-04daveward2005F-ECM
Factor: 1947650918516954648521 / (ECM curve 2, B1=50000, B2=5000000)
2019-04-08TJAOINF
no factor from 2^67 to 2^68
2018-05-13kkmrkkblmbrbkC-LL
3242D340671515F8
2017-06-16Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-01-12mikrNF-PM1
B1=3000000, B2=100000000, E=12
2015-10-30ramgeisNF
no factor from 2^65 to 2^66
2015-03-09VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-09VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-05-31Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-27James HeinrichNF-PM1
B1=160000, B2=3640000, E=6
2011-01-18JossNF-PM1
B1=50000
2010-10-10Oscar ÖstlinNF-PM1
B1=40000, B2=630000, E=6
2009-01-16Sturle SundeNF
no factor from 2^60 to 2^61