#include <bits/stdc++.h>
using namespace std;
const int N = 1e6 + 9;
const int mod = 1e9 + 7;

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    int t;
    cin >> t;
    while(t--){
        long long a ,n;
        cin >> n >> a;
        long long b = n;
        for(long long i = n; i >= a; i--){
            if(__gcd(i , a) == 1){
                b = i;
                break;
            }
        }
        cout << b << "\n";
        
    }
    return 0;
}