is 2 1439017 - 1
has 433188 decimal digits
takes 0.055 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD906CEC84D8745F5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.648868.6567%500000150000000.07144.9236%20.720270.1999%1.5432%
PrimeNet2560.006762.5000%65001100000.00072.7769%0.007363.5414%1.0414%
GPU722600.106765.0000%6000900000.00061.3549%0.107365.4742%0.4742%
Difference+7+20.5420+3.6567%+494000+14910000+0.0708+3.5687%+20.6129+4.7257%+4.7257%

Known prime factors (1 factor, 72.9 bits, 0.00506828% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
143901790186151771596112647772272.9333133602722260964
22 × 59 × 67 × 223 × 888694039
2008-03-06223888694039912.612.68055.0065

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers15000243750---0.002--0.837%
2016-03-17T19:14:20alpertronManual testing5000001500000012---0.071--4.924%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-13T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-21T00:00:00ANONYMOUSv4_computers21258--0.027--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.400 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000299 / 1002.9904.954%
2550000299 / 2801.06834.309%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.400 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100014.5770.000%
25500001.64419.326%
302500000.14086.905%
3510000000.01099.023%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000024911.77
250000350000005013.63


Lucas-Lehmer results:
No L-L results for M1439017


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T23:36:36Oliver KruseGTX-3
9018615177159611264777
567DA5DB61559D__no
2017-10-27T05:04:57Chang Chia-Tchehomura
9018615177159611264777
567DA5DB61559D__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 15000, B2 = 243750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
101
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104
105
106
101
102
103
104
105
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109
TF factor-bounds graph:
267
258
257
250
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2100
Last modified: 2021-10-07T10:30:52+00:00