is 2 14724539 - 1
has 4432528 decimal digits
takes 7.051 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2DF8A269EBD0E314double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2672.018064.1791%18000040050000.26974.4737%2.287765.7816%1.6025%
PrimeNet2650.495563.0769%6500019000000.11464.0875%0.610064.5862%1.5092%
GPU722698.108065.2174%10000026000000.16402.9851%8.272066.2557%1.0383%
Difference-2-6.0900-1.0383%+80000+1405000+0.1057+1.4886%-5.9844-0.4741%-0.4741%

Known prime factors (1 factor, 72.4 bits, 0.00049144% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1472453960719829091544730299032272.363206185840831909
181 × 1139148291889
2016-11-03181113914829188967.32543,09780,492

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-02-03T00:00:00ANONYMOUSv4_computers1800004005000---0.270--4.474%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-08-24T00:00:00Net_Forcev4_computers21256--0.001--
2000-08-31T00:00:00Net_Forcev4_computers21257--0.001--
2000-09-08T00:00:00Net_Forcev4_computers21258--0.003--
2000-09-23T00:00:00Net_Forcev4_computers21259--0.005--
2000-11-25T00:00:00Team_Deutschlandv4_computers21265--0.495--
2014-09-05T07:21:00NesowaManual testing265266--0.508--
2015-10-10T04:21:04NesowaManual testing266267--1.015--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.728 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.728 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03296.826%
25500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.728


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-09-21T00:00:00Architects Cubedv4_computers2DF8A269EBD0E3147.051
2005-12-24T00:00:00Team Prime Ribv4_computers2DF8A269EBD0E3147.051


PRP results:
No PRP results for M14724539


P-1 factor-bounds graph:
B1 = 180000, B2 = 4005000 (P-1 stage 2)
B1 = 180000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2016-11-03T16:09:04+00:00