import sys
input = sys.stdin.readline

N, K = map(int, input().split())
A = list(map(int, input().split()))


A.sort(reverse=True)
dp = [0 for _ in range(1<<N)]
dp[0] = K
for bit in range(1, 1<<N):
    p = 0
    for i in range(N):
        if bit&(1<<i):
            p = max(dp[bit^(1<<i)] % A[i], p)
    dp[bit] = p

print(dp[-1])