#include<iostream>
using namespace std;
int v[2000002];
int main(void){
	int n, k; cin >> n >> k;
	for (int i = 2; i <= n; i++){
		if (!v[i]){
			v[i] = 1;
			for (int j = i+i; j <= n; j+=i) v[j]++;
		}
	}
	int ans = 0;
	for (int i = 2; i <= n; i++){ ans += v[i] >= k; }
	cout << ans << endl;
	return 0;
}