#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b;
  cin >> a >> b;
  int ans = 1;
  for (int i = 2, _; i <= b; ++i) {
    _ = ceil(1.0 * a / i);
    if (_ * i >= a && _ * i <= b && (_ + 1) * i >= a && (_ + 1) * i <= b)
      ans = i;
  }
  cout << ans;
  return 0;
}