#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template <class T> using vec = vector<T>;
template <class T> using vvec = vector<vec<T>>;


int ma = 5000000;
vector<int> v(ma+1);
vector<int> prime;

void erast(){
    for(int i=0;i<=ma;i++){
        v[i] = 1;
    }
    for(int i=2;i*i<=ma;i++){
        if(v[i]){
            for(int j=0;i*(j+2)<=ma;j++){
                v[i*(j+2)]=0;
            }
        }
    }
    v[1] = false;
    for(int i=2;i<=ma;i++){
        if(v[i]){
            prime.push_back(i);
        }
    }
}

void solve(){
    ll A,P;
    cin >> A >> P;
    if(v[P]) cout << (A%P==0? 0:1) << "\n";
    else cout << -1 << "\n";
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    erast();
    int T;
    cin >> T;
    while(T--){
        solve();
    }
}