import java.io.BufferedReader
import java.io.InputStream
import java.io.InputStreamReader
import java.io.PrintWriter
import java.lang.IllegalArgumentException
import java.lang.StringBuilder
import java.util.*

fun PrintWriter.solve(sc: FastScanner) {
    val n = sc.nextInt()
    val k = sc.nextInt()
    val a = Array(n) { sc.nextInt() }
    a.sortDescending()
    var max = 0
    for (i in 0 until 1.shl(n - 1)) {
        var v = k
        val lst = mutableListOf(n - 1)
        for (j in 0 until n - 1) {
            if ((1.shl(j) and i) != 0) {
                lst.add(j)
            }
        }
        lst.sort()
        for (j in lst) {
            v %= a[j]
        }
        max = maxOf(max, v)
    }
    println(max)
}

fun main(args: Array<String>) {
    val writer = PrintWriter(System.out, false)
    writer.solve(FastScanner(System.`in`))
    writer.flush()
}

class FastScanner(s: InputStream) {
    private var st = StringTokenizer("")
    private val br = BufferedReader(InputStreamReader(s))

    fun next(): String {
        while (!st.hasMoreTokens()) st = StringTokenizer(br.readLine())

        return st.nextToken()
    }

    fun nextInt() = next().toInt()
    fun nextLong() = next().toLong()
    fun nextLine() = br.readLine()
    fun nextDouble() = next().toDouble()
    fun ready() = br.ready()
}