#include<iostream>
#include<cstring>
using namespace std;
const int PRIME = 2000005;


int nPrime, prime[PRIME];

void makePrime() {
    static bool isPrime[PRIME];
    for (int i = 0; i < PRIME; ++i) isPrime[i] = true;

    for (int i = 2; i * i < PRIME; ++i)
        if (isPrime[i])
            for (int j = i * 2; j < PRIME; j += i)
                isPrime[j] = false;
    
    nPrime = 0;
    for (int i = 2; i < PRIME; ++i)
        if (isPrime[i])
            prime[nPrime++] = i;
}


int N, K;

void read() {
    cin >> N >> K;
}


void work() {
    static int cnt[PRIME];
    memset(cnt, 0, sizeof(cnt));
    
    for (int i = 0; i < nPrime; ++i)
        for (int j = prime[i]; j < PRIME; j += prime[i])
            ++cnt[j];
    
    int ans = 0;
    for (int i = 0; i <= N; ++i)
        if (cnt[i] >= K)
            ++ans;
    
    cout << ans << endl;
}


int main() {
    makePrime();
    read();
    work();
    return 0;
}