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

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MnStatusDetails
436831Factored
FactorDigitsBitsDate
305073466581189160483565147826928734111.22012-10-03 10:20:50
ECM
DigitsB1Curves
2550000280 / 280
30250000200 / 640
Estimated T-Level: 26.6 ⓘ
TF below 2^83 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski38C50
Verified (Factored)Michael J. Kilfoyle8459D2BF9961F8C50
Verified (Factored)Eivind Triel8459D2BF9961F8C5257129
Verified (Factored)2002-01-22Dennis Pope8459D2BF9961F8C5206053
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-24Oliver Kruse474FE882912EB8AF1013
Verified2017-09-24Oliver Kruse474FE882912EB8AF1013
Verified2017-11-09kkmrkkblmbrbk474FE882912EB8AF115249213
Unverified (Reliable)2020-04-18Oliver KruseC4FAA5BCB8323A__125750953
P-1 factors
DateFactorB1B2
2012-10-033050734665811891604835651478269287200000001000000000
History
DateUserTypeResult
2020-04-18Oliver KruseC-PRP
M436831/3050734665811891604835651478269287 : C4FAA5BCB8323A__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-11-09kkmrkkblmbrbkC-PRP
M436831/3050734665811891604835651478269287 : 474FE882912EB8AF
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-24Oliver KruseC-PRP
M436831/3050734665811891604835651478269287 : 474FE882912EB8AF
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-24Oliver KruseC-PRP
M436831/3050734665811891604835651478269287 : 474FE882912EB8AF
PRP: Unverified (Reliable)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=3000000, B2=100000000, E=12
2012-10-03markrF-PM1
Factor: 3050734665811891604835651478269287
2010-08-22Rob_DeeNF-PM1
B1=1000000, B2=2000000, E=6
2010-08-21Rob_DeeNF-PM1
B1=500000, B2=1000000
2009-08-27Carsten KossendeyNF-PM1
B1=436831