#include <iostream>
#include <cmath>
#include <list>

#define FORR(i,b,e) for(int i=(b);i<(int)(e);++i)
#define FOR(i,e) FORR(i,0,e)
#define dump(var) cerr << #var ": " << var << "\n"
#define dumpc(con) for(auto& e: con) cerr << e << " "; cerr<<"\n"

typedef long long ll;
typedef unsigned long long ull;

using namespace std;

int prime[2000001];
int f[2000001];
int count_factors(int limit, int thres) {
    prime[2] = 1;
    for (int i = 3; i <= limit; i+=2) prime[i] = 1;
    for (int i = 4; i <= limit; i+=2) {
        f[i]++;
    }

    for (int i = 3, l = limit/2 /*(int)sqrt(limit)+1*/; i <= l; i+=2) {
        if (prime[i]) {
            for (int j = i*2; j <= limit; j += i) {
                prime[j] = 0;
                f[j]++;
            }
        }
    }

    int count = 0;
    for (int i = 2; i <= limit; i++) {
        count += (f[i]+prime[i] >= thres);
    }
    return count;
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int N, K;
    cin >> N >> K;

    cout << count_factors(N, K) << "\n";

    return 0;
}