synchronous, so make it so -- node primes

gistfile1.js

var isPrime2 = function(n) {
  var root = Math.sqrt(n);
  for (var i=3; i<=root; i += 2) {
    if (n%i == 0) {
      return false;
    }
  }
  return true;
}

var primes2 = function (primesn) {
  results = [];
  for (var i=3; i<primesn; i+=2) {
    if (isPrime2(i)) {
      results.push(i);
    }
  }
  return results;
}


primes2(process.argv[2]);