#!/usr/bin/env perl

use strict;
use warnings;

my ($n, $k) = split / /, <>; chomp $k;

if ($k >= 21) {
  print "0\n";
  exit;
}

my $ans = 0;
my @prime_count;
for (my $i = 2; $i <= $n; $i++) {
  if (!$prime_count[$i]) {
    for (my $j = $i; $j <= $n; $j += $i) {
      $prime_count[$j]++;
    }
  }
  if ($prime_count[$i] >= $k) {
    $ans++;
  }
}

print "$ans\n";