#include<bits/stdc++.h>
using namespace std;
#define ll long long

bool isprime[5000010];

void eratosthenes(){
    isprime[0] = isprime[1] = false;
    for(int i = 2; i <= 5000000; i++) isprime[i] = true;
    for(int i = 2; i <= 5000000; i++) if(isprime[i]) for(int j = 2 * i; j <= 5000000; j += i) isprime[j] = false;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    eratosthenes();
    ll n, a, p; cin >> n;
    while(cin >> a >> p){
        if(isprime[p]) cout << (a % p ? 1 : 0) << '\n';
        else cout << -1 << '\n';
    }
}