import java.math.*;
import java.util.*;

class Main{
	
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int k = sc.nextInt();
        if(k==1){
        	System.out.println(n-1);return;
        }
        int[] sosuu = new int[n+1];
        for(int i=2;i<=n;i++){
        	if(sosuu[i]==0){
        		int x = i*2;
        		while(x<=n){
        			sosuu[x]++;
        			x+=i;
        		}
        	}
        }
        int ans=0;
        for(int i=2;i<=n;i++){
        	if(sosuu[i]>=k) ans++;
        }
        System.out.println(ans);
    }
}