is 2 1907 - 1
has 575 decimal digits
takes 0.000 GHz-days to do one PRP test
Has been fully factored.
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-
Cofactor is a certified prime

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actualunknown----0.00000.0000%
Target2440.001275.0000%500100000.00000.7486%0.001275.1872%
Difference-44-0.0012-75.0000%-500-100000.0000-0.7486%-0.0012-75.1872%

Known prime factors (3 factors, 1,907.0 bits, 100.00000000% known):
Remaining cofactor is a certified-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
190716856964161434782985791532580.480441975987452406475768
23 × 7 × 6421 × 21407 × 57418543099		-2140757418543099199,220,9100.10770.2012
1907549579229567201980511856813160299324944611143141.9791440952358592558942086672294599631161365
32 × 5 × 937 × 310996801927891 × 109885805102058858491		2008-11-223109968019278911098858051020588584916.765e+13206,183,368385,074,200
1907
click to show decimal representation
5081,684.5412008-11-22

1 Composite Factors:
P-1 results:
No P-1 results for M1907


Trial Factoring results:
No TF results for M1907


ECM factoring results:
Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
No L-L results for M1907


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-16kkmrkkblmbrbkkel1
1685696416143478298579153
5495792295672019805118568131602993249446111
PRP


P-1 factor-bounds graph:
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67.8
250
260
270
280
290
2100
2110
2120
2130
2140
2150
Last modified: 2023-04-26T21:34:10+00:00