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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MnStatusDetails
437141Factored
FactorDigitsBitsDate
102036255249385501596891099332230334109.72019-05-17 01:31:05
ECM
DigitsB1Curves
2550000280 / 280
30250000314 / 640
Estimated T-Level: 27.5 ⓘ
TF below 2^86 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski24630
Verified (Factored)Michael J. Kilfoyle6F046B4E128E24630
Verified (Factored)Eivind Triel6F046B4E128E2463150323
Verified (Factored)2002-01-22Dennis Pope6F046B4E128E2463196239
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-05-19ANONYMOUS351F23CD8B2B0F2A123753653
Verified2019-05-24M Graber351F23CD8B2B0F2A122506053
History
DateUserTypeResult
2019-05-24M GraberC-PRP
M437141/1020362552493855015968910993322303 : 351F23CD8B2B0F2A
PRP: Verified
PRP without proof (small exponent)
2019-05-19ANONYMOUSC-PRP
M437141/1020362552493855015968910993322303 : 351F23CD8B2B0F2A
PRP: Verified
PRP without proof (small exponent)
2019-05-17alexF-ECM
Factor: 1020362552493855015968910993322303 / (ECM curve 99, B1=250000, B2=25000000, Sigma=5097691990629895)
2018-12-13Gordon SpenceNF
no factor from 2^65 to 2^66
2017-12-21Gordon SpenceNF
no factor from 2^64 to 2^65
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-11-18Gordon SpenceNF
no factor from 2^63 to 2^64
2015-11-18Gordon SpenceNF
no factor from 2^62 to 2^63
2012-12-01dbaughNF
no factor from 2^61 to 2^62
2012-11-27dbaughNF
no factor from 2^60 to 2^61
2012-11-13markrNF-PM1
B1=20000000, B2=1000000000, E=12
2010-08-24Rob_DeeNF-PM1
B1=1000000, B2=2000000, E=6
2010-08-23Rob_DeeNF-PM1
B1=500000, B2=1000000
2009-08-27Carsten KossendeyNF-PM1
B1=437141