#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using V = vector<int>;
using VV = vector<V>;
using VVV = vector<VV>;
using VL = vector<ll>;
using VVL = vector<VL>;
using VVVL = vector<VVL>;
template<class T> using VE = vector<T>;
template<class T> using P = pair<T, T>;
#define rep(i,n) for(int i=0;i<(n);i++)
#define rep1(i,n) for(int i=1;i<=(n);i++)
#define REP(i,k,n) for(int i=(k);i<(n);i++)
#define all(a) (a).begin(),(a).end()
#define output(x,y) cout << fixed << setprecision(y) << x << endl;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
ll lcm(ll a, ll b) { return a / gcd(a, b) * b; }
const ll MOD = 1e9 + 7;
// const ll MOD = 998244353;
ll upper = MOD + MOD;
ll under = -upper;
ll UPPER = MOD * MOD;
ll UNDER = -UPPER;
const long double pi = 3.141592653589793;
const int N = 5050505;
VE<bool> Sieve(N + 100, true);
void precalc() {
	Sieve[0] = Sieve[1] = false;
	REP(i, 2, N + 1) {
		if (Sieve[i]) {
			for (int j = i + i; j <= N; j += i) Sieve[j] = false;
		}
	}
}
int main() {
	precalc();
	int t;
	cin >> t;
	while (t--) {
		ll x, p;
		scanf("%lld%lld", &x, &p);
		if (!Sieve[p]) printf("%d\n", -1);
		else printf("%d\n", gcd(x, p) != 1);
	}
	return 0;
}