#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < n; i++)
#define rep2(i, x, n) for(int i = x; i <= n; i++)
#define rep3(i, x, n) for(int i = x; i >= n; i--)
#define elif else if
#define sp(x) fixed << setprecision(x)
#define pb push_back
#define eb emplace_back
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
using ll = long long;
using ld = long double;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
const ll MOD = 1e9+7;
//const ll MOD = 998244353;
const int inf = (1<<30)-1;
const ll INF = (1LL<<60)-1;
const ld EPS = 1e-10;
template<typename T> bool chmax(T &x, const T &y) {return (x < y)? (x = y, true) : false;};
template<typename T> bool chmin(T &x, const T &y) {return (x > y)? (x = y, true) : false;};

int main(){
    int MAX = 5000000;
    bool p[MAX+1];
    fill(p, p+MAX+1, true);
    p[1] = false;
    rep2(i, 2, MAX){
        if(p[i]){
            for(int j = 2; i*j <= MAX; j++){
                p[i*j] = false;
            }
        }
    }
    int T;
    cin >> T;
    while(T--){
        ll A, P;
        cin >> A >> P;
        if(!p[P]) cout << -1 << endl;
        else cout << (A%P == 0? 0 : 1) << endl;
    }
}