#include <bits/stdc++.h>
using namespace std;int main(){int n,k,i=2,j,c=0;vector<int> y(2000001,0);cin>>n>>k;for(;i<=n;i++){if(y[i]==0){for(j=i;j<=n;j+=i){y[j]++;}}c+=(y[i]>=k);}cout<<c<<endl;}