is 2 173 - 1
has 53 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
factored, 0 PRP tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP93581CD69AF30FB7PRP-tested
Cofactor is a certified prime

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actualunknown----0.00000.0000%
Target2440.013581.8182%500500000.00000.3328%0.013581.8787%
Difference-44-0.0135-81.8182%-500-500000.0000-0.3328%-0.0135-81.8787%

Known prime factors (4 factors, 173.0 bits, 100.00000000% known):
Remaining cofactor is a certified-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
173730753619.4792112
26 × 3 × 11		-64645.883e-109.435e-101.920e-9
1731505447720.5224351
19 × 229		-192291.568e-94.488e-105.700e-10
173700844367125532231755.960202556175469807
3181 × 37987 × 1676281		-37987167628149.0441.876e-62.515e-6
173
hide decimal representation
155285743288572277679887
2477.039

4 Composite Factors:
P-1 results:
No P-1 results for M173


Trial Factoring results:
No TF results for M173


ECM factoring results:
No ECM results for M173


Lucas-Lehmer results:
No L-L results for M173


PRP results:
dateuseridcompidcofactorsres64PRP
2018-01-24Luke_Richardswork-laptop93581CD69AF30FB7no
2018-01-24-p95holder- @bopoh13Lucius_Yorkfield
730753
1505447
70084436712553223
PRP


P-1 factor-bounds graph:
100
101
102
103
104
105
100
101
102
103
104
105
106
107
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67.9
250
260
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Last modified: 2023-10-02T12:12:48+00:00