<!DOCTYPE html>
<html>
  <script>
// all primes up to 1 million
    var primes = [2, 3, 5, 7]; // first few, in an array

    function isPrime(n)
    {
        //check all primes known so far..
        for (var i = 0; i < primes.length; i++)
        {
            // if one divides n
            if ((n % primes[i]) === 0)
                return false; // its not prime
        }
        primes.push(n); // add to array
        return true;
    }

    for (var x = 8; x < 1000000; x++)
    {
        if (isPrime(x))
        {
            document.write(x + " ");
        }
    }

  </script>
  <head>
    <title>Primes</title>
  </head>
  <body>

  </body>
</html>