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Difference between revisions of "Gcwsieve"
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'''gcwsieve''' (and '''gcwsievecl''') are used to create sieve files for a (General) [[Woodall prime]] or (General) [[Cullen prime]] sequence. | '''gcwsieve''' (and '''gcwsievecl''') are used to create sieve files for a (General) [[Woodall prime]] or (General) [[Cullen prime]] sequence. | ||
| − | + | This software is developed by [[Mark Rodenkirch]] and is included in the packaged distribution of [[Mtsieve]]. | |
==Commands overview== | ==Commands overview== | ||
Revision as of 13:39, 30 April 2023
Contents
Description
gcwsieve (and gcwsievecl) are used to create sieve files for a (General) Woodall prime or (General) Cullen prime sequence.
This software is developed by Mark Rodenkirch and is included in the packaged distribution of Mtsieve.
Commands overview
Help with gcwsieve -h.
Installation
Create a folder containing the sieve program.
Creating a new sieve
Example:
gcwsieve.exe -s- -b1024 -n2 -N5000 -P1000000000
Parameters:
-s-: using Woodall (Cullen: -s+)-b1024: using base 1024-n2: lowest n-value-N5000: highest n-value-P1000000000: highest prime to search for
After running the file "gcw_b1024.pfgw" in ABC fileformat will be created.
Continuing an existing sieve file
To continue the search call this (from example above):
gcwsieve.exe -P2000000000 -igcw_b1024.pfgw
Parameters:
-P2000000000: the new sieve-depth is given-igcw_b1024.pfgw: the standard output from first run is used as input file
See also
Sieving program
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