is 2 4292383 - 1
has 1292137 decimal digits
takes 0.535 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2676.922565.6716 %2240001110091501.13216.8944 %8.054668.0384 %
Target2651.699764.6154 %2400022500000.02631.9268 %1.726065.2972 %
Difference+2+5.2228+1.0563 %+200000+108759150+1.1058+4.9676%+6.3286+2.7412 %

Known prime factors (3 factors, 166.7 bits, 0.00388327% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
42923838559696165393191549.60599707973
3 × 33235991
-3332359913.166e-50.32750.6116
429238327778086876200091651.303323574188
22 × 7 × 11556221
2014-06-247115562210.00010.11390.2127
4292383632407554132925375692065.7777366625416848
24 × 3 × 131 × 1171537121
2019-01-0713111715371213.413511.54321.560

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2023-03-31USAFSSUSAFSACS224000111009150
skipped known factor: 855969616539319
skipped known factor: 2777808687620009
--1.1958.315%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2014-06-24TJAOIManual testing??
51.303
16
4.93701e-5


ECM factoring results:
Total ECM effort:0.548 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.548


Lucas-Lehmer results:
No L-L results for M4292383


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
2777808687620009
855969616539319
4A5267A326948F53
2018-01-27ATHec2-1xh
855969616539319
2777808687620009
4A5267A326948F53
2019-01-07ATHec2-PRPCF
855969616539319
2777808687620009
63240755413292537569
A87338962C356385
2019-01-08kkmrkkblmbrbkc5.large
855969616539319
2777808687620009
63240755413292537569
A87338962C356385


CERT results:
No CERT results for M4292383


P-1 factor-bounds graph:
B1 = 224000, B2 = 111009150 (P-1 stage 2)
B1 = 224000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00