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Search prime numbers

Jul 10th, 2018
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PHP 0.14 KB | None | 0 0
  1. function is_prime($n){
  2.     if($n==1)
  3.         return false;
  4.     for($d=2; $d*$d<=$n; $d++){
  5.         if($n%$d==0)
  6.             return false;
  7.         }
  8.     return true;
  9.     }
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