import java.math.*;
import java.util.*;

// https://speakerdeck.com/gyudon/shorfalsearugorizumu?slide=7

class Main{
	static boolean end(BigInteger r,BigInteger n){
		var gcd=r.gcd(n);
		if(!gcd.equals(n)&&!gcd.equals(BigInteger.ONE)){
			System.out.println("! "+gcd+" "+n.divide(gcd));
			return true;
		}
		return false;
	}

	public static void main(String[] $){
		var s=new Scanner(System.in);
		var n=s.nextBigInteger();

		for(long i=2;true;++i){
			System.out.println("? "+i);

			var r=s.nextBigInteger().divideAndRemainder(BigInteger.TWO);
			if(r[1].equals(BigInteger.ZERO)){
				if(end(BigInteger.valueOf(i).modPow(r[0],n).add(BigInteger.ONE),n))
					return;
				if(end(BigInteger.valueOf(i).modPow(r[0],n).subtract(BigInteger.ONE),n))
					return;
			}
		}
	}
}