Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
2415239Factored
FactorDigitsBitsDate
2621286103164601533612167.82023-06-01 08:48:37
784929094794068912380677808632996.02014-03-24 13:06:43
ECM
DigitsB1Curves
255000067 / 280
Estimated T-Level: 21.2
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-03-31David JedelskyA75878EB417400290
Verified (Factored)1999-03-26Cyril FlaigA75878EB41740029407382
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-13Oliver Kruse5A9D3AA1AA88734E161558753
Verified (Factored)2017-11-26kkmrkkblmbrbk5A9D3AA1AA88734E153154253
Verified2023-06-07Perig5A9D3AA1AA88734E2182413453
P-1 factors
DateFactorB1B2
2014-03-2478492909479406891238067780863310282243439508
History
DateUserTypeResult
2023-06-07curtiscCERT
PRP Certification
Proof certified good
2023-06-07PerigC-PRP
M2415239/78492909479406891238067780863/262128610316460153361 : 5A9D3AA1AA88734E
PRP proof power = 7
PRP: Verified
Proof certified good
2023-06-01TJAOIF
Factor: 262128610316460153361 / TF: 67-68
2022-03-09LordJuliusNF
no factor from 2^1 to 2^60
2018-09-28alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-26kkmrkkblmbrbkC-PRP
M2415239/78492909479406891238067780863 : 5A9D3AA1AA88734E
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-13Oliver KruseC-PRP
M2415239/78492909479406891238067780863 : 5A9D3AA1AA88734E
PRP: Verified (Factored)
PRP without proof (not generated)
2014-03-24mikrF-PM1
Factor: 78492909479406891238067780863
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-06-04Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-19markrNF-PM1
B1=95000, B2=1923750, E=6
2010-11-16JossNF-PM1
B1=20000
2010-11-09JossNF-PM1
B1=15000
2009-01-15Sturle SundeNF
no factor from 2^60 to 2^61