#include<iostream>
#include<algorithm>
#include<vector>
#include<string>
#include<utility>
#include<map>
#include<set>
#include<queue>
#include<stack>
#include<functional>
#include<math.h>
#include<random>
#include <bitset>
using namespace std;
#define N (1000000000+7)
//#define N 998244353
#define INF 1e16
typedef long long ll;
typedef pair<int,int> P;
typedef pair<int,P> Q;
 
const int inf = (int)1e9; 
 
ll gcd(ll a, ll b) {
	if (b > a) {
		ll tmp = b;
		b = a;
		a = tmp;
	}
	if (a%b == 0)return b;
	else return gcd(b, a%b);
}


int main(void){
	ll T;
	cin>>T;
	for(int i=0;i<T;i++){
		ll a,p;
		cin>>a>>p;
		bool flag = false;
		for(ll i=2;i*i<=p;i++){
			if(p%i==0){
				flag = true;
				break;
			}
		}
		if(flag)cout<<-1<<endl;
		else{
			if(a%p==0)cout<<0<<endl;
			else cout<<1<<endl;
		}
	}
	return 0;
}