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
5007283Factored
FactorDigitsBitsDate
4608898308095928945592168.62020-08-25 04:50:33
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-12-13Damon SicoreD37A68AD39D03D890
Verified (Factored)2000-04-19Shaun BryantD37A68AD39D03D892773666
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-08-28ViliamF8EC20BD839FE0D2B130696353
History
DateUserTypeResult
2020-08-28George WoltmanCERT
PRP Certification
Proof certified good
2020-08-28ViliamFC-PRP
M5007283/460889830809592894559 : 8EC20BD839FE0D2B
PRP proof power = 7
PRP: Verified
Proof certified good
2020-08-25Smok_bmv F
Factor: 460889830809592894559 / TF: 68-69*
2018-06-17mikrNF-PM1
B1=3600000, B2=120000000, E=12
2017-10-18mikrNF
no factor from 2^67 to 2^68
2016-12-02Squeeky_SquirrelNF-PM1
B1=300000, B2=9375000, E=12
2016-05-13Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^63
2015-04-20Gordon SpenceNF
no factor from 2^65 to 2^66
2014-11-10JossNF-PM1
B1=67818
2014-08-28lycornNF
no factor from 2^64 to 2^65
2014-08-26krackerNF
no factor from 2^63 to 2^64
2009-07-13USAFSSNF-PM1
B1=55000, B2=907500, E=6