import java.util.*;

public class Main {
   public static void main(String[] args) throws Exception {
       Scanner koko = new Scanner(System.in);
       int num = koko.nextInt();
       int k = koko.nextInt();

       int ptr = 0;                        
       int[] prime = new int[150000];  

       prime[ptr++] = 2;
       prime[ptr++] = 3;           

       for (int n = 5; n <= 2000000; n += 2) {  
           boolean wflag = false;
           for (int i = 0; prime[i]*prime[i] <= n; i++) { 
               if (n % prime[i] == 0){
                   wflag = true;
                   break;
               }

           }
           if (!wflag){
               prime[ptr++] = n;
           }                   
       }
       int[] count = new int[num+1];
       int number=0;
       for(int i=2; i<num+1; i++){
           count[i]=0;
           for(int j=0; prime[j]<=i; j++){
               if(i%prime[j]==0){
                   count[i]++;
                   if(count[i]>=k){
                       number++;
                       break;
                   }
               }
           }
       }
       System.out.println(number);
   }
}