problem with gmp_add_ui/floating point exception

[DUDE man]

Hello all,

Sorry to bother you all again. I'm working on a factoring program and I keep 
getting this floating point exception when I go into the mpz_add_ui 
function. I've included the core dump and the code. Any help would be 
greatly appreciated. When I checked the add function outside the while loop 
it worked, I wasn't sure if these functions used threads or why it would 
possibly do this.

Thanks,
Evan

P.S. I'm running this on cygwin in Windows XP if that matters at all (I'm 
not sure why it would).

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