use std::io::Read;

fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	let v: Vec<usize> = s.split_whitespace().flat_map(str::parse).collect();
	let mut d = v[1];
	for &a in &v[2..] {
		let (mut a, mut b) = (a, d);
		while a != 0 {
			(b, a) = (a, b % a);
		}
		d /= b;
	}
	println!("{}", if d == 1 { "YES" } else { "NO" })
}