Segmentation fault (core dumped)

I am trying to run a repetitive script. Basically, one function over and over. Every time I run it from the command line I get "Segmentation fault (core dumped)". If I run it with the PHP module for apache, "Segmentation fault (core dumped)" appears in the error log. It seems to be a memory issue. If I run it via the command line I can get through the function 1426 times, while the apache module only allows 1371 (both are consistent). If I reduce the output to the screen, the number of times the function runs increases. I can't just minimize the output to the screen, I have to go through 62^12 repetitions. Does anyone have any ideas on how to fix this??? Thanks in advance, Evan Nemerson