Decomp.exe
 

Where can I find out all the available options about what switches I can use with this program.

The file [url=ftp://mersenne.org/gimps/decomp.zip]decomp.zip[/url], linked to from the [url=http://www.mersenne.org/status.htm]GIMPS Status page[/url], includes a readme:
[quote]How to decompress the factors and nofactors data.

1) Download and unzip one or both of factors.zip and nofactor.zip.
2) To get factors, run "decomp -f start_exponent end_exponent"
3) To get the k in 2kp+1, run "decomp -k start_exponent end_exponent"
4) To get the nofactor data, run "decomp -n start_exponent end_exponent"
5) To get the nofactor data with "Test=" in front of each line,
run "decomp -t start_exponent end_exponent"
6) To get the nofactor data with "Factor=" in front of each line,
run "decomp -w start_exponent end_exponent"[/quote]

Thanks.

The version I have does not have the readme file, but I have grabbed that now :D