#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef pair<ll, ll> P;
typedef vector<ll> VI;
typedef vector<VI> VVI;
const ll MOD = 1000000007;
const ll INF = 1e18;
#define REP(i, n) for(int i = 0; i < n; i++)
#define ALL(v) v.begin(), v.end()

ll power(ll x, ll y, ll p) {
	if (y==0) return 1;
	else if (y==1) return x%p;
	else if (y%2==0) { ll pow=power(x,y/2,p); return (pow*pow)%p; } 
	else { ll pow=power(x,y/2,p); return ((pow*pow)%p)*x%p; }
}

int main() {
	int t; cin >> t;
	while(t--){
		ll a, p; cin >> a >> p;
		bool no=0;
		for(int i=2;i<=sqrt(p);i++){
			if(p%i==0){
				printf("-1\n");
				no=1;
			}
		}
		if(no)
			continue;
		ll f=0;
		for(int i=1;i<=p;i++){
			f*=i;
			f%=(p-1);
		}
		printf("%ld\n",power(a,f,p));
	}
	return 0;
}