This little script just searches for prime numbers. It outputs the found prime numbers to one file and the progress of it's searching to another. It was just fun to write, and i pushed the results through some numbercrunching modules on CPAN just so I could have the joy of finding no lasting pattern for myself. ;o) 
use strict;
use Math::BigInt;

open(OUT, ">", "C:\\Devel\\Fun\\MathFun\\search.txt")
    or die "No output file";

open(ANS, ">", "C:\\Devel\\Fun\\MathFun\\primes.txt")
    or die "No primes file";

my @primes = (Math::BigInt->new(2),
            Math::BigInt->new(3),
            Math::BigInt->new(5),
            Math::BigInt->new(7));

print "Enter value to search to: ";
my $max = <STDIN>;
chop($max);

my $x = Math::BigInt->new(10);
for($x; $x < $max; $x++) {
    my $is = 1;
    foreach my $prime (@primes) {
        my $diff = $x->bmod($prime);
        $diff = chop($diff);
        print OUT "\t$prime\t$diff\n";
        if ($diff == 0) {
            $is = 0;
            last;
        }
    }
    if ($is) {
        my $y = Math::BigInt->new($x);
        push(@primes, $y);
        print OUT "\t\t\t\tPrime:\t$y\n";
        print "Prime:\t$y\n";
    }
    print OUT "\n";
}

foreach my $prime (@primes) {
    my $prime = substr($prime,1);
    print ANS "$prime\n";
}

[download]

In reply to Finding Primes by Fideist11

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