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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
5210563Factored
FactorDigitsBitsDate
6711116575387338405823553792824732105.72021-08-25 07:07:45
ECM
DigitsB1Curves
255000033 / 280
Estimated T-Level: 20.6 ⓘ
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Bad1998-09-06Ferenc Ka`rpa`ti9C8206BCD45CB9060
Verified (Factored)2000-09-08Darin O'RandD31D7DCBBAA668321507069
Verified (Factored)2001-06-09Willamette MathematicsD31D7DCBBAA668321706976
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-08-25happy5214C59AA8F9EADA87521495213953
History
DateUserTypeResult
2021-08-28happy5214NF-PP1
Start=2/7, B1=1250000, B2=78750000
2021-08-25SRBaseNF
no factor from 2^70 to 2^71
2021-08-25skippydCERT
PRP Certification
Proof certified good
2021-08-25happy5214C-PRP
M5210563/67111165753873384058235537928247 : C59AA8F9EADA8752
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-25happy5214F-PP1
Start=2/7, B1=1250000, Factor: 67111165753873384058235537928247
2021-08-25happy5214NF-PM1
B1=2500000, B2=207500000
2021-08-17SRBaseNF
no factor from 2^69 to 2^70
2020-12-08TJAOINF
no factor from 2^68 to 2^69
2018-06-17ramgeisNF
no factor from 2^67 to 2^68
2018-04-14Squeeky_SquirrelNF-PM1
B1=310000, B2=9222500, E=12
2016-05-28Gordon SpenceNF
no factor from 2^66 to 2^67
2015-08-10snme2pm1NF
no factor from 2^65 to 2^66
2014-12-19VictordeHollanderNF
no factor from 2^64 to 2^65
2014-12-19VictordeHollanderNF
no factor from 2^63 to 2^64
2009-10-22USAFSSNF-PM1
B1=60000, B2=975000, E=6
2009-06-18GrunwalderGIMPNF
no factor from 2^62 to 2^63