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

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Exponent Range:










MnStatusDetails
4399729Factored
FactorDigitsBitsDate
20302522343227057569704472580.72018-12-17 20:09:18
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)Russ NelsonF20035F1B893A3E50
Verified (Factored)2000-03-15Murray HendersonF20035F1B893A3E51955672
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-12-18Oliver KruseBB3CF9D525F9FDD31343692653
Verified2018-12-19Carlos PinhoBB3CF9D525F9FDD3124286853
P-1 factors
DateFactorB1B2
2018-12-172030252234322705756970447223773962656681
History
DateUserTypeResult
2018-12-19Carlos PinhoC-PRP
M4399729/2030252234322705756970447 : BB3CF9D525F9FDD3
PRP: Verified
PRP without proof (not generated)
2018-12-18Oliver KruseC-PRP
M4399729/2030252234322705756970447 : BB3CF9D525F9FDD3
PRP: Verified
PRP without proof (not generated)
2018-12-17Ismo LaitelaF-PM1
Factor: 2030252234322705756970447 / (P-1, B1=2237739, B2=62656681, E=12)
2018-10-30chuenkitNF
no factor from 2^67 to 2^68
2018-05-07chuenkitNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-20snme2pm1NF
no factor from 2^65 to 2^66
2014-07-10lycornNF
no factor from 2^64 to 2^65
2014-07-09JayderNF
no factor from 2^63 to 2^64
2012-02-29GrunwalderGIMPNF
no factor from 2^1 to 2^63
2012-01-14Squeeky_SquirrelNF-PM1
B1=110000, B2=2255000, E=6
2010-11-03markrNF
no factor from 2^61 to 2^62
2009-08-08Carsten KossendeyNF-PM1
B1=25000, B2=356250