import sys
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))


N,K = MI()
A = LI()

dp = [0]*(1<<N)  # dp[i] = iを使った時の余りの最大値
dp[0] = K
for i in range(1,1<<N):
    for j in range(N):
        if (i>>j) & 1:
            dp[i] = max(dp[i],dp[i^(1<<j)] % A[j])

print(dp[-1])