#include<iostream>
#include<string>
#include<math.h>
using namespace std;

/*int sosu(long long N){
	long long A;
	int J = 0;
	for (long long i1 = 2; i1 < N/2; i1++){
		A = (N / i1)*i1;
		if (A == N){
			J = 1;
			break;
		}
	}
	return J;

}*/

int main(){
	long long n;
	int k;
	int d[2000000] = {0};
	int cnt = 0;
	int cnt1 = 0;
	int ans = 0;
	cin >> n >> k;
	if (k > 1){
		for (long long i1 = 2; i1 < n + 1; i1++){
			if (d[i1] == 0){
				for (long long i = i1 * 2; i < n + 1; i += i1){
					d[i]++;
				}
			}

			
			if (d[i1] >= k) ans++;
			
		}
	}
	else{
		ans = n - 1;
	}

		cout << ans << endl;


	

	return 0;
}