import sys
prime = [1] * 5000001
prime[0] = prime[1] = 0
for i in range(2, 5000001):
  if prime[i]:
    for j in range(2 * i, 5000001, i): prime[j] = 0
for _ in range(int(sys.stdin.readline())):
  A, P = map(int, sys.stdin.readline().split())
  if prime[P]:
    if A % P: print(1)
    else: print(0)
  else: print(-1)