#include <iostream>
#include <iomanip>
#include <vector>

using namespace std;
using int64 = long long;

vector<bool> isPrime(6*1000000, true);

void primes(const int64 _max, vector<bool>& isPrime) {
    isPrime[0] = isPrime[1] = false;
    for (int64 i=4; i<=_max; i+=2) isPrime[i] = false;
    for (int64 i=3; i<=_max; i+=2) {
        if (!isPrime[i]) continue;
        for (int64 j=i*i; j<=_max; j+=i) {
            isPrime[j] = false;
        }
    }
}

void solve() {
    int64 a,p;
    cin >> a >> p;
    if (isPrime[p]) {
        cout << (a%p!=0) << endl;
    } else {
        cout << -1 << endl;
    }
}

int main() {
    int t;
    cin >> t;
    primes(5*1000000, isPrime);

    for (int i=0; i<t; i++) solve();
}