import sys
input = sys.stdin.readline
from random import randint

def miller_rabin(n, rep=50): #random.randint
    if n == 2: return True
    if n == 1 or n % 2 == 0: return False
    d = (n - 1) // 2
    while d % 2 == 0:
        d //= 2
    for k in range(rep):
        a = randint(1, n - 1)
        t = d
        y = pow(a, t, n)
        while t != n - 1 and y != 1 and y != n - 1:
            y = (y * y) % n
            t *= 2
        if y != n - 1 and t % 2 == 0:
            return False
    return True

T = int(input())

res = []

for _ in range(T):
    a, p = map(int, input().split())
    if not miller_rabin(p):
        print(-1)
    else:
        if a % p == 0:
            res.append(0)
        else:
            res.append(1)

print('\n'.join(map(str, res)))