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

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MnStatusDetails
15083983Factored
FactorDigitsBitsDate
47534252099954468308732272.02021-11-08 04:31:23
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2002-09-07Binary Digits18E8B7CF84948FA67852544
Bad2006-08-14Scott KurowskiA71DD62ECEF1BD5D3347913
Verified (Factored)2007-02-20Shane Sanford18E8B7CF84948FA68568625
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2023-06-15JacobZD47F9D8318914D3D1363399253
History
DateUserTypeResult
2023-06-15curtiscCERT
PRP Certification
Proof certified good
2023-06-15JacobZC-PRP
M15083983/4753425209995446830873 : D47F9D8318914D3D
PRP proof power = 8
PRP: Verified
Proof certified good
2021-11-08Smok_bmv F
Factor: 4753425209995446830873 / TF: 72-73*
2021-09-24-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-06SRBaseNF
no factor from 2^70 to 2^71
2021-07-06lycornNF
no factor from 2^69 to 2^70
2018-03-01riccardo ubertiNF-PM1
B1=430000, B2=9000000, E=12
2017-10-08ramgeisNF
no factor from 2^68 to 2^69
2016-05-22mikrNF
no factor from 2^67 to 2^68
2016-03-16Mark RoseNF
no factor from 2^65 to 2^66
2014-06-11NesowaNF
no factor from 2^66 to 2^67