import math
import random

n = int(input())
while True:
  a = random.randint(2, n - 1)
  g = math.gcd(a, n)
  if g > 1:
    print('! %d %d' % (g, n / g), flush = True)
    break
  print('? %d' % a, flush = True)
  r = int(input())
  if r % 2 == 1:
    continue
  p = math.gcd(pow(a, r // 2, n) + 1, n)
  q = math.gcd(pow(a, r // 2, n) - 1, n)
  if p < n and q < n:
    print('! %d %d' % (p, q), flush = True)
    break