#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#include <algorithm>
#include <bitset>
#include <climits>
#include <cmath>
#include <cstring>
#include <deque>
#include <forward_list>
#include <functional>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

using namespace std;
typedef long long ll;
typedef pair<int, int> P;
typedef bitset<16> BS;
struct edge {
    int to, cost, id;
};
const double EPS = 1E-09;
const ll MOD = 1E+09 + 7; // =998244353;
const ll INF = 1E18;
const int MAX_N = 2E+06;

ll dx[4] = { -1, 1, 0, 0 }, dy[4] = { 0, 0, -1, 1 };

int N, K;

ll spf[MAX_N + 1]; //spf[i]はiの素因数のうち最小のものを示す

void smallest_prime_factor(ll n);

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

    cin >> N >> K;
    smallest_prime_factor(N);

    int ans = 0;
    for (int i = 2; i <= N; i++) {
        // cout << "i = " << i << ", spf = " << spf[i] << "\n";
        if (spf[i] >= K)
            ans++;
    }

    /*
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            cout << "i = " << i << ", j = " << j << ", dp = " << dp[i][j] << "\n";
        }
    }
    */

    cout << ans << "\n";

    return 0;
}

//n以下のspfを求める
void smallest_prime_factor(ll n)
{
    for (ll i = 2; i <= n; i++) {
        if (spf[i] == 0) {
            for (ll j = i; j <= n; j += i) {
                spf[j]++;
            }
        }
    }
}