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
8423879Factored
FactorDigitsBitsDate
304289619095712095897932374.72021-12-05 10:57:56
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2000-08-10Upper Silesia7BA4995E461E3AEB1754067
Verified (Factored)2002-10-12Ars Technica Team Prime Rib7BA4995E461E3AEB5176261
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-12-10ATHE752A99366F83FEE1263497853
P-1 factors
DateFactorB1B2
2021-12-0530428961909571209589793102373430712007
History
DateUserTypeResult
2021-12-10Xie ShiquanCERT
PRP Certification
Proof certified good
2021-12-10ATHC-PRP
M8423879/30428961909571209589793 : E752A99366F83FEE
PRP proof power = 8
PRP: Verified
Proof certified good
2021-12-05NumberwangNF-PM1
B1=600000, B2=18000000
2021-12-05GdSF-PM1
Factor: 30428961909571209589793 / (P-1, B1=1023734, B2=30712007, e=12, n=512K CUDAPm1 v0.22)
2021-10-05SRBaseNF
no factor from 2^71 to 2^72
2021-08-26SRBaseNF
no factor from 2^70 to 2^71
2021-08-19SRBaseNF
no factor from 2^69 to 2^70
2020-01-10TJAOINF
no factor from 2^68 to 2^69
2018-03-04monstNF
no factor from 2^67 to 2^68
2016-01-06snme2pm1NF
no factor from 2^66 to 2^67
2015-05-25VictordeHollanderNF
no factor from 2^65 to 2^66
2014-12-03David CampeauNF
no factor from 2^64 to 2^65
2014-03-18lycornNF
no factor from 2^64 to 2^65
2012-07-26bcp19NF-PM1
B1=100000, B2=1825000, E=6