1// The Great Computer Language Shootout
2//  http://shootout.alioth.debian.org
3//
4//  Contributed by Ian Osgood
5
6function pad(n,width) {
7  var s = n.toString();
8  while (s.length < width) s = ' ' + s;
9  return s;
10}
11
12function primes(isPrime, n) {
13  var i, count = 0, m = 10000<<n, size = m+31>>5;
14
15  for (i=0; i<size; i++) isPrime[i] = 0xffffffff;
16
17  for (i=2; i<m; i++)
18    if (isPrime[i>>5] & 1<<(i&31)) {
19      for (var j=i+i; j<m; j+=i)
20        isPrime[j>>5] &= ~(1<<(j&31));
21      count++;
22    }
23}
24
25function sieve() {
26    for (var i = 4; i <= 4; i++) {
27        var isPrime = new Array((10000<<i)+31>>5);
28        primes(isPrime, i);
29    }
30    return isPrime;
31}
32
33var result = sieve();
34