I have problem with PFGW
 

can any one help me how to use PFGW to find factorial primes example: 3507!-1

How can i sieve for them, (are there any other utilities).
If you can please give a detailed reply.

Are using Windows or linux?
"!" especially in Windows can be misinterpreted.

Put the candidate in a file, and then test without any problems.
You can use the shortcut in command-line as well.

[CODE]pfgw64s -N -k -f -l -q'3507!-1'
3507!-1 is 3-PRP! (2.0993s+0.1825s)

pfgw64s -N -k -f -l -tp -q'3507!-1'
Primality testing 3507!-1 [N+1, Brillhart-Lehmer-Selfridge]
Running N+1 test using discriminant 3511, base 1+sqrt(3511)
3507!-1 is prime! (7.3174s+0.0018s)
[/CODE]What seems to be the problem?

I won't answer the question that was asked, but will answer the question that should've been asked. Please coordinate with PrimeGrid, as they are already doing search on Factorial primes ([url]http://www.primegrid.com/forum_thread.php?id=3008[/url])

[QUOTE=khudothitaymo;498759]can any one help me how to use PFGW to find factorial primes example: 3507!-1

How can i sieve for them, (are there any other utilities).
If you can please give a detailed reply.[/QUOTE]

For factorials and multi-factorials, use mfsieve, which is built upon the mtsieve framework.

Nevertheless, PrimeGrid is testing factorials. Here is their current status: [url]http://prpnet.primegrid.com:12002/[/url]