fn main() {
    let (n, k): (usize, usize) = {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        let mut iter = buf.split_whitespace();
        (
            iter.next().unwrap().parse().unwrap(),
            iter.next().unwrap().parse().unwrap(),
        )
    };

    let a: Vec<usize> = {
        let mut buf = String::new();
        std::io::stdin().read_line(&mut buf).unwrap();
        let iter = buf.split_whitespace();
        iter.map(|x| x.parse().unwrap()).collect()
    };

    let mut dp = vec![vec![0; n]; 1 << n];
    for i in 0..n {
        dp[1 << i][i] = k % a[i];
    }
    for s in 1..(1 << n) {
        for i in 0..n {
            if (s & (1 << i)) != 0 { continue; }
            for j in 0..n {
                dp[s | (1 << i)][i] = {
                    std::cmp::max(
                        dp[s | (1 << i)][i],
                        dp[s][j] % a[i],
                    )
                }
            }
        }
    }
    
    let ans = dp[(1 << n) - 1].iter().max().unwrap();
    println!("{}", ans);
}