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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Exponent Range:










MnStatusDetails
4800623Factored
FactorDigitsBitsDate
43252434333624277933501512581.82023-03-09 18:26:49
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)1998-10-25Marc HoneyBBD479984ADF8A040
Verified (Factored)2000-07-12salvadorBBD479984ADF8A044252496
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-03-14Naegi Makoto5ED2B8CFFAB48E411259898653
P-1 factors
DateFactorB1B2
2023-03-094325243433362427793350151410000010597329600
History
DateUserTypeResult
2023-03-14hooibergCERT
PRP Certification
Proof certified good
2023-03-14Naegi MakotoC-PRP
M4800623/4325243433362427793350151 : 5ED2B8CFFAB48E41
PRP proof power = 7
PRP: Verified
Proof certified good
2023-03-09Sid & AndyF-PM1
Factor: 4325243433362427793350151 / (P-1, B1=4100000, B2=10597329600)
2020-12-06-Anonymous-NF
no factor from 2^71 to 2^72
2020-12-02-Anonymous-NF
no factor from 2^70 to 2^71
2020-12-02-Anonymous-NF
no factor from 2^69 to 2^70
2020-12-02-Anonymous-NF
no factor from 2^68 to 2^69
2018-05-08ramgeisNF
no factor from 2^67 to 2^68
2017-11-17YxinityNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^1 to 2^61
2015-07-17snme2pm1NF
no factor from 2^65 to 2^66
2015-01-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-03VictordeHollanderNF
no factor from 2^63 to 2^64
2013-11-29David CampeauNF-PM1
B1=420000, B2=10920000, E=12
2011-09-28GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-05-13markrNF
no factor from 2^61 to 2^62
2009-08-28Carsten KossendeyNF-PM1
B1=30000, B2=420000