#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
#define FOR(i,m,n) for(int i=(m);i<(n);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
using ll = long long;
const int INF = 0x3f3f3f3f;
const ll LINF = 0x3f3f3f3f3f3f3f3fLL;
const double EPS = 1e-8;
const int MOD = 1000000007;
// const int MOD = 998244353;
const int dy[] = {1, 0, -1, 0}, dx[] = {0, -1, 0, 1};
const int dy8[] = {1, 1, 0, -1, -1, -1, 0, 1}, dx8[] = {0, -1, -1, -1, 0, 1, 1, 1};
template <typename T, typename U> inline bool chmax(T &a, U b) { return a < b ? (a = b, true) : false; }
template <typename T, typename U> inline bool chmin(T &a, U b) { return a > b ? (a = b, true) : false; }
struct IOSetup {
  IOSetup() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    cout << fixed << setprecision(20);
  }
} iosetup;

vector<bool> sieve_of_eratosthenes(int val) {
  vector<bool> res(val + 1, true);
  res[0] = false;
  if (val >= 1) res[1] = false;
  for (int i = 2; i * i <= val; ++i) {
    if (res[i]) {
      for (int j = i * i; j <= val; j += i) res[j] = false;
    }
  }
  return res;
}

int main() {
  vector<bool> primes = sieve_of_eratosthenes(5000000);
  int t; cin >> t;
  while (t--) {
    ll a; int p; cin >> a >> p;
    if (primes[p]) {
      cout << (a % p > 0) << '\n';
    } else {
      cout << "-1\n";
    }
  }
  return 0;
}