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

vector<bool> ip(5000010, true);
void er(){
    ip[0] = ip[1] = 0;
    for(int i = 2; i <= 5000000; i++) if(ip[i]) for(int j = 2 * i; j <= 5000000; j += i) ip[j] = false;
}

int main(){
    er();
    ll n, a, p; cin >> n;
    while(cin >> a >> p){
        if(ip[p]) cout << (a % p ? '1\n' : '0\n');
        else cout << '-1\n';
    }
}