#include <iostream>
using namespace std;
int a[1<<21],n,k,c;
main()
{
	cin>>n>>k;
	for(int i=2;i<=n;i++)
	{
		if(!a[i])for(int j=i;j<=n;j+=i)a[j]++;
		c+=a[i]>=k;
	}
	cout<<c<<endl;
}