<?php

set_time_limit(60);

$stime = time();
$i = 20;
$completion = false;

while(!$completion) {
    $checkarray = array(3,6,7,8,9,11,12,13,14,15,16,17,18,19);
    $fail = false;
    foreach($checkarray as $value) {
        if(!($i % $value == 0)) {
            $fail = true;
        }
    }
    if($fail) {
        $i = $i + 20;
    } else {
        $completion = true;
    }
}

$etime = time();

echo $i . " in " . ($etime - $stime) . " seconds";

?>