use std::io::*;

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let n: usize = itr.next().unwrap().parse().unwrap();
    let k: usize = itr.next().unwrap().parse().unwrap();

    let mut table: Vec<usize> = vec![0; n + 1];
    let mut prime = Vec::new();
    let mut is_prime: Vec<bool> = vec![true; n + 1];
    for i in 2..n + 1 {
        if is_prime[i] {
            prime.push(i);
            let mut j = i;
            while j <= n {
                table[j] += 1;
                is_prime[j] = false;
                j += i;
            }
        }
    }

    let mut ans = 0;
    for i in 0..n + 1 {
        if table[i] >= k {
            ans += 1;
        }
    }
    println!("{}", ans);
}