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

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MnStatusDetails
2217503Factored
FactorDigitsBitsDate
692565068974299922974472375.92020-07-04 08:54:23
ECM
DigitsB1Curves
255000082 / 280
Estimated T-Level: 21.5 ⓘ
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Robert ClarkAEA9304CAD2052850
Verified (Factored)1999-03-01Aaron BAEA9304CAD205285511938
Verified (Factored)2018-04-18kkmrkkblmbrbkAEA9304CAD2052852134282
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-07-04M Miller353ACCB2B3202E561137768353
Verified2020-07-04ATH353ACCB2B3202E561189036853
History
DateUserTypeResult
2020-07-04ATHC-PRP
M2217503/69256506897429992297447 : 353ACCB2B3202E56
PRP: Verified
PRP without proof (not generated)
2020-07-04M MillerC-PRP
M2217503/69256506897429992297447 : 353ACCB2B3202E56
PRP: Verified
PRP without proof (not generated)
2020-07-04daveward2005F-ECM
Factor: 69256506897429992297447 / (ECM curve 1, B1=50000, B2=5000000)
2019-04-22TJAOINF
no factor from 2^67 to 2^68
2018-04-18kkmrkkblmbrbkC-LL
AEA9304CAD205285
2016-12-23Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-12-18Alexander DubrovinNF-PM1
B1=2000000, B2=65000000, E=12
2015-11-17Alexander DubrovinNF-PM1
B1=1000000, B2=20000000, E=12
2015-11-16Alexander DubrovinNF-PM1
B1=1000000, B2=7000000, E=12
2015-10-23ramgeisNF
no factor from 2^65 to 2^66
2015-04-29Squeeky_SquirrelNF-PM1
B1=160000, B2=4600000, E=6
2015-03-06VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-06VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-29JossNF-PM1
B1=142888
2014-05-26JossNF-PM1
B1=113944
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-04-18Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-19Oscar ÖstlinNF-PM1
B1=85000, B2=1593750, E=6
2010-10-11Oscar ÖstlinNF-PM1
B1=75011
2009-01-11Sturle SundeNF
no factor from 2^60 to 2^61