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

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MnStatusDetails
15136279Factored
FactorDigitsBitsDate
4907813791191440072321832478.72022-10-18 15:43:39
ECM
DigitsB1Curves
255000014 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2002-11-16Lee MarlowCE2B2CDF4C60B1B013498330
Verified (Factored)2006-02-01Balu SrinivasanCE2B2CDF4C60B1B011560619
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-07-06ANONYMOUS001A65889C43C5931976775453
History
DateUserTypeResult
2023-11-04nordiNF-PM1
B1=480000, B2=449768550
2023-10-22nordiNF-PM1
B1=480000
2023-07-06iwesCERT
PRP Certification
Proof certified good
2023-07-06ANONYMOUSC-PRP
M15136279/490781379119144007232183 : 001A65889C43C593
PRP proof power = 8
PRP: Verified
Proof certified good
2022-10-18ATHF-PP1
Start=2/7, B1=1000000, B2=29000000, Factor: 490781379119144007232183
2021-10-15-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-02SRBaseNF
no factor from 2^70 to 2^71
2021-06-29lycornNF
no factor from 2^69 to 2^70
2017-10-11ramgeisNF
no factor from 2^68 to 2^69
2017-01-23ConductorNF
no factor from 2^67 to 2^68
2016-03-16Mark RoseNF
no factor from 2^65 to 2^66
2014-05-14NesowaNF
no factor from 2^66 to 2^67