Untitled

<!DOCTYPE html>

<html lang="en">
    <head>
        <meta charset="utf-8" />
        <title></title>
    </head>
    <body>
        <script type="text/javascript">
            function czy_pierwsza(n) {
                if (n < 2) return false;

                for (var i = 2; i * i <= n; i++) {
                    if (n % i == 0) return false;
                } return true;
            }

            for (var n = 1; n < 100000; n++) {
                if (czy_pierwsza(n)) document.write(n + " TAK" + "<br />");
                else document.write(n + " NIE" + "<br />");
            }
        </script>
    </body>
</html>