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(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();
		var rnd=new Random();
		var mod=n.subtract(BigInteger.TWO);

		while(true){
			var v=new BigInteger(n.bitLength(),rnd).mod(mod).add(BigInteger.TWO);
			if(end(v,n))
				return;
			System.out.println("? "+v);

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