#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define mp make_pair
#define FAST ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define INF INT_MAX
#define ff first
#define ss second
#define all(v) v.begin(),v.end()
#define nl "\n"
using namespace std;
const ll MOD  = 1e9+7;
const int mxN = 2e5+1;


int main()
{
    FAST
    //==================
    ll t; cin >> t;
    while(t--){
       ll n, a; cin >> n>>a;
       for(ll i=n;i>=1;i--){
        if(__gcd(i,a) == 1){
            cout << i << nl;
            break;
        }
       }

    }



}