It crashed after only 10 million. JAVA can easily reach 100 million without crashing. It doesn't have any optimization algorithm. Python is also unsupportable.

#!/usr/local/php53/bin/php

/**
* @params array=rs_array
*/

#define(MAX,1000);

$MAX = 1000;
$from = 2;
$rs_array= array();


echo $MAX."以内的素数...n";

while($from<$MAX){
    $is_susu=true;

    foreach($rs_array as $vals){
	if ((sqrt($from)+1) % $vals == 0 ){
        $is_susu=false;break;
    }
    }

    if($is_susu) {
	echo $from." ";
        $rs_array[]=$from;
    }

    $from++;
}
?>