#include <bits/stdc++.h>

using namespace std;

vector<int> primes(1, 2);
vector<bool> isPrime(static_cast<int>(2 * 1e6 + 1), true);

map<int, int> dp;

int cnt(int num) {
	if (num == 1) return 0;
	if (isPrime[num]) return 1;
	int res = 0;
	for (long long i = 0; primes[i] * primes[i] <= num; i++) {
		if (num % primes[i]) continue;
		res++;
		while (num % primes[i] == 0) num /= primes[i];
	}
}


void hawawa()
{
	int n, k;
	cin >> n >> k;
	isPrime[0] = isPrime[1] = false;
	for (long long i = 3; i <= 2 * 1e6; i += 2) {
		if (!isPrime[i]) continue;
		for (long long j = i * i; j <= 2 * 1e6; j += i) {
			isPrime[j] = false;
		}
		primes.push_back(i);
	}
	int ans = 0;
	for (int i = n; i >= 2; i--) {
		if (k <= cnt(i) ){
			ans++;
		}
	}
	cout << ans << "\n";
}

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