N,K=map(int,input().split())
A=list(map(int,input().split()))
dp=[0]*(1<<N)
dp[0]=K
for bit in range(1<<N):
    for i in range(N):
        if bit&1<<i:
            dp[bit]=max(dp[bit],dp[bit^1<<i]%A[i])
ans=dp[-1]
print(ans)