#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
const int MAX = 1e9;
const int MIN = -1*1e9;
const ll MAXLL = 1e18;
const ll MINLL = -1*1e18;

vector<bool> Eratosthenes(int N) {
    vector<bool> isprime(N+1, true);
    isprime[1] = false;

    for (int p = 2; p <= N; ++p) {
        if (!isprime[p]) continue;
        for (int q = p * 2; q <= N; q += p) {
            isprime[q] = false;
        }
    }

    return isprime;
}


int main()
{
    vector<bool> isPrime = Eratosthenes(5100000);

    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int T; cin >> T;
    for(int t = 0; t < T; t++)
    {
        ll A,P; cin >> A >> P;
        if(!isPrime[P]) cout << -1 << endl;
        else cout << (A%P == 0 ? 0 : 1) << endl;
    }
    return 0;
}