#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
#define REP(i,m,n) for(int i=(int)(m); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define RREP(i,m,n) for(int i=(int)(m); i>=(int)(n); i--)
#define rrep(i,n) RREP(i,n-1,0)
#define all(v) v.begin(), v.end()
const int inf = 1e9+7;
const ll longinf = 1LL<<60;
const ll mod = 1e9+7;
const ld eps = 1e-10;

bool is_prime(const ll n) {
  switch(n) {
  case 0: // fall-through
  case 1: return false;
  case 2: // fall-through
  case 3: return true;
  }
  if(n % 2 == 0) return false;
  if(n % 3 == 0) return false;
  if(n % 6 != 1 && n % 6 != 5) return false;
  for(ll i=5; i*i<=n; i+=6) {
    if(n % i     == 0) return false; // 6n-1
    if(n % (i+2) == 0) return false; // 6n+1
  }
  return true;
}
ll modpow(ll a, ll N, ll mod=mod) {
  ll ans = 1;
  ll tmp = a;
  while(N > 0) {
    if(N % 2 == 1) (ans *= tmp) %= mod;
    (tmp *= tmp) %= mod;
    N /= 2;
  }
  return ans;
}
void solve() {
  ll a, p; cin >> a >> p;
  if(!is_prime(p)) cout << -1 << endl;
  else {
    ll ans = 1;
    rep(i, p) (ans *= modpow(a, i+1, p)) %= p;
    cout << ans << endl;
  }
}
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  int t; cin >> t;
  while(t--) {
    solve();
  }
  return 0;
}