$rand_max = 1025;
sub my_rand{
  $rnd = rand;
  return int($rnd*$rnd * $rand_max);
}

@a = ();
for(1..100000) {
  $n = my_rand();
  $a[$n]++;
}

$i = 1;
while($i <= 1024) {
  print "$i: ", $a[$i], $/;
  $i = $i*2;
}

##</code><code>##

1: 1338
2: 913
4: 718
8: 526
16: 397
32: 280
64: 195
128: 137
256: 99
512: 65
1024: 42