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Old 2016-11-20, 00:06   #2
Brian Gladman
 
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May 2008
Worcester, United Kingdom

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The values used for quintsize (and hence qstep) are set by the def-par.txt file. The format of lines in this file are described in the file while individual lines set out the parameters used for various size factoring jobs. I believe that you should be able to do what you want by modifying appropriate lines to suit your needs (note however that factmsieve.py changes the values for very large jobs of 160 digits or more).
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