#include<bits/stdc++.h>
using namespace std;

int main(){
  int n, k;
  cin >> n >> k;
  vector<long long> a(n + 1, 0);
  for(long long i = 2; i <= n; i++){
    if(a[i] == 0){
      for(long long j = i; j <= n; j += i){
        a[j]++;
      }
    }
  }
  int count = 0;
  for(int i = 0; i <= n; i++){
    if(a[i] >= k)count++;
  }
  cout << count << endl;
}