using System;
using System.Collections;
using System.Collections.Generic;
 
class TEST{
	static void Main(){
		Sol mySol =new Sol();
		mySol.Solve();
	}
}

class Sol{
	public void Solve(){
		
		int[] A=new int[N+1];
		A[0]=0;A[1]=0;
		for(int i=2;i<=N;i++){
			if(A[i]==0){
				for(int j=i;j<=N;j+=i){
					A[j]++;
				}
			}
		}
		int ans=0;
		for(int i=2;i<=N;i++){
			if(A[i]>=K)ans++;
		}
		Console.WriteLine(ans);
		
	}
	int N;
	int K;
	public Sol(){
		var d=ria();
		N=d[0];K=d[1];
	}




	static String rs(){return Console.ReadLine();}
	static int ri(){return int.Parse(Console.ReadLine());}
	static long rl(){return long.Parse(Console.ReadLine());}
	static double rd(){return double.Parse(Console.ReadLine());}
	static String[] rsa(){return Console.ReadLine().Split(' ');}
	static int[] ria(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>int.Parse(e));}
	static long[] rla(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>long.Parse(e));}
	static double[] rda(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>double.Parse(e));}
}