Don't increment $number at random points in your code. 
LOOP:
for ($number = 3; $number < $limit; $number += 2) {
  ...
  foreach $div (@primes) {
    if ($number % $div == 0) {
      next LOOP;
    }
  }
  ...
}

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In reply to Re: Newbie Question on pushing Arrays by Anonymous Monk
in thread Newbie Question on pushing Arrays by m_heimburger

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