import java.io.*;
import java.util.Arrays;
import java.util.StringTokenizer;

class Main{

static final InputStream in=System.in;
static final PrintWriter out=new PrintWriter(System.out);

public static void main(String[] args) throws IOException{
BufferedReader br=new BufferedReader(new InputStreamReader(in));
String line="";
while((line=br.readLine())!=null&&!line.isEmpty()){
StringTokenizer st=new StringTokenizer(line);
int n=Integer.parseInt(st.nextToken());
int k=Integer.parseInt(st.nextToken());
//boolean[] p=sieveOfEratosthenes(n);
int[] a=new int[n+1];
for(int i=2;i<=n;i++){
if(a[i]==0) for(int j=i;j<=n;j+=i) a[j]++;
//if(p[i]) 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++;
out.println(ans);
}
out.flush();
}
/*
public static boolean[] sieveOfEratosthenes(int n){
boolean[] p=new boolean[n+1];
Arrays.fill(p,true);
p[0]=false;
p[1]=false;
for(int i=2;i<=Math.sqrt(n);i++){
if(p[i]) for(int j=i+i;j<=n;j+=i) p[j]=false;
}
return p;
}
*/
}