#include <bits/stdc++.h>
using namespace std;
 
#define REP(i, n) for (ll i = 0; i < n; i++)
#define REPR(i, n) for (ll i = n; i >= 0; i--)
#define FOR(i, m, n) for (ll i = m; i < n; i++)
#define FORR(i, m, n) for (ll i = m; i >= n; i--)
#define REPO(i, n) for (ll i = 1; i <= n; i++)
#define ll long long
#define INF (ll)1 << 60
#define MINF (-1 * INF)
#define ALL(n) n.begin(), n.end()
#define MOD 1000000007
#define P pair<ll, ll>


bool IsPrime(ll n) {
    if (n <= 1)return false;
    for (ll i = 2; i <= sqrt(n); i++)
    {
        if (n % i == 0)return false;
    }
    return true;
}
vector<bool> era(ll n) {
    vector<bool> ok(n + 1, true);
    ok[0] = false;
    ok[1] = false;
    vector<ll> res;
    for (ll i = 2; i <= sqrt(n); ++i) {
        if (IsPrime(i)) {
            for (ll j = i * i; j <= n; j += i) ok[j] = false;
        }
    }
    FOR(i, 2, n + 1)if (ok[i])res.push_back(i);
    return ok;
}
vector<bool> s = era(10000000);
int main() {
    ll t;
    cin >> t;
    REP(i, t){
        ll a, v;
        cin >> a >> v;
        if(!s[v]){
            cout << -1 << endl;
            continue;
        }
        cout << (a % v == 0 ? 0 : 1) << endl;
    }
}