Пример #1
0
function count_primes($from, $to)
{
    Primes::computeTo($to);
    return Primes::count($from, $to);
}
Пример #2
0
    {
        if (in_array($value, self::$known_primes)) {
            return true;
        }
        for ($i = 0; $i < count(self::$known_primes); $i++) {
            $prime = self::$known_primes[$i];
            if ($value % $prime == 0) {
                return false;
            }
        }
        self::$known_primes[] = $value;
        return true;
    }
}
class Primes
{
    public static function upTo($max)
    {
        $result = array(2);
        $prime = new Prime(3);
        while ($prime->lessThan($max)) {
            $result[] = $prime->value;
            $prime = $prime->next();
        }
        return $result;
    }
}
foreach (file($argv[1]) as $line) {
    $max = trim($line);
    echo implode(",", Primes::upTo($max)) . "\n";
}