checkFactors
Return the maximum prime factor for a range of numbers.
Syntax
checkFactors(min_number, max_number)
Description
checkFactors loops through the given range of numbers and finds the numbers with the smallest maximum prime factors. This allows suitable grid sizes to be selected to maximise the speed of the FFT (this is fastest for FFT lengths with small prime factors). The output is printed to the command line, and a plot of the factors is generated.
For example, running the code checkFactors(100, 200) produces the folling output.
Numbers with a maximum prime factor of 2 128 Numbers with a maximum prime factor of 3 108 144 162 192 Numbers with a maximum prime factor of 5 100 120 125 135 150 160 180 200 Numbers with a maximum prime factor of 7 105 112 126 140 147 168 175 189 196 Numbers to avoid (prime numbers) 101 103 107 109 113 127 131 137 139 149 151 157 163 167 173 179 181 191 193 197 199
Inputs
min_number |
integer specifying the lower bound of values to test |
max_number |
integer specifying the upper bound of values to test |
See Also
factor