from collections import defaultdict
import math


def Sieve_of_Eratosthenes(maxA):
    lst = [None]*(maxA+1)
    lst[0] = False
    lst[1] = False
    for i in range(2, maxA+1):
        if lst[i] is None:
            for g in range(i, maxA+1, i):
                if lst[g] is None:
                    lst[g] = False
            lst[i] = True
    return lst


maxA = 5*10**6 + 1
lst = Sieve_of_Eratosthenes(maxA)
t = int(input())
for _ in range(t):
    a, p = map(int, input().split())
    if lst[p]:
        if math.gcd(a, p) == 1:
            print(1)
        else:
            print(0)
    else:
        print(-1)