Hi, I created a function to check whether it is prime number or not.I just get the $number to be checked as an argument and loop it to check if it has a reminder 0 from 2 .. $number-1.The script worked for smaller numbers but it failed for '429496731'.The program hangs and I dont get an output for this test number.Could you please explain what is happening in this case of number ? 
my $input = $ARGV[0];
my $flag = 0;
my $i;
for ($i=2; $i < $input ; $i++) {
    if ($input % $i == 0) {
                $flag = 1;
        last;
    }
}
if ($flag == 0) {
    print "$input is prime.\n";
    exit;
}

print "$input is not prime and divisible by $i.\n";

[download]
<Test Failed condition>
perl prime.pl 4294967311

In reply to is_a_prime test? by Anonymous Monk

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