..... (long list of primes omitted ).... 59753 is prime. 59771 is prime. 59779 is prime. 59791 is prime. 59797 is prime. 59809 is prime. <-------I hit CTRL-C after this iteration. Out of memory! Use of uninitialized value $j in modulus (%) at primes.pl line 17. Use of uninitialized value $i in modulus (%) at primes.pl line 17. Illegal modulus zero at primes.pl line 17. Free to wrong pool 2f4d50 not 1000 during global destruction.