from random import randint
from sys import exit
from math import gcd
def answer(p):
    print('!', p, n // p)
    exit(0)
n = int(input())
while True:
    x = randint(2, n - 2)
    if gcd(n, x) > 1:
        answer(x)
    print('?', x, flush = True)
    r = int(input())
    if r % 2 == 0:
        p = pow(x, r // 2, n) + 1
        if p != n:
            answer(p)