#include <bits/stdc++.h>

int ri() {
	int n;
	scanf("%d", &n);
	return n;
}


int main() {
	std::vector<bool> isprime(5000001, true);
	isprime[0] = isprime[1] = false;
	for (int i = 2; i <= 5000000; i++) {
		if (!isprime[i]) continue;
		for (int j = i + i; j <= 5000000; j += i) isprime[j] = false;
	}
	
	int t = ri();
	for (int i = 0; i < t; i++) {
		int64_t a;
		scanf("%" SCNd64, &a);
		int p = ri();
		puts(isprime[p] ? a % p ? "1" : "0" : "-1");
	}
	
	return 0;
}