using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static string InputPattern = "InputX";

    static List<string> GetInputList()
    {
        var WillReturn = new List<string>();

        if (InputPattern == "Input1") {
            WillReturn.Add("2 1");
            //1
        }
        else if (InputPattern == "Input2") {
            WillReturn.Add("4 2");
            //0
            //2,3,4の中で素因数を2つ以上持つ数はないので答えは0である
        }
        else if (InputPattern == "Input3") {
            WillReturn.Add("1000 4");
            //23
        }
        else {
            string wkStr;
            while ((wkStr = Console.ReadLine()) != null) WillReturn.Add(wkStr);
        }
        return WillReturn;
    }

    static int[] SosuuArr;

    //エラトステネスの篩
    static void Eratosthenes(int pJyougen)
    {
        var CheckArr = new System.Collections.BitArray(pJyougen + 1);
        for (int I = 2; I <= CheckArr.Count - 1; I++) {
            CheckArr[I] = true;
        }
        for (int I = 2; I <= CheckArr.Count - 1; I++) {
            if (I != 2 && I % 2 == 0) continue;

            if (CheckArr[I]) {
                for (int J = I * 2; J <= CheckArr.Count - 1; J += I) {
                    CheckArr[J] = false;
                }
            }
        }
        var SosuuList = new List<int>();
        for (int I = 2; I <= CheckArr.Count - 1; I++)
            if (CheckArr[I]) SosuuList.Add(I);

        SosuuArr = SosuuList.ToArray();
    }

    static void Main()
    {
        List<string> InputList = GetInputList();
        int[] wkArr = InputList[0].Split(' ').Select(X => int.Parse(X)).ToArray();
        int N = wkArr[0];
        int K = wkArr[1];

        Eratosthenes(N);
        int[] SoinsuuCntArr = new int[N + 1];

        for (int I = 0; I <= SosuuArr.GetUpperBound(0); I++) {
            for (int J = SosuuArr[I]; J <= N; J += SosuuArr[I]) {
                SoinsuuCntArr[J]++;
            }
        }
        Console.WriteLine(SoinsuuCntArr.Count(X => X >= K));
    }
}