"""

答えを見た

30段になるまでは、mod2でやってok

"""

import sys
from sys import stdin


def nCr_Plane(n,r):
    if n < r or n < 0:
        return 0
    import math
    return math.factorial(n) // (math.factorial(n-r) * math.factorial(r))
    
def nCr_Lucas(n,r,mod):

    ret = 1
    while n > 0 and r > 0:
        ret = (ret * nCr_Plane(n % mod , r % mod)) % mod
        n //= mod
        r //= mod
    return ret


        
    

TT = int(stdin.readline())
ANS = []

for loop in range(TT):

    N,M = map(int,stdin.readline().split())

    A = list(map(int,stdin.readline().split()))
    FOOT = 32

    if len(A) >= FOOT:

        a_tmp = []

        for slide in range(FOOT):

            #B = A[slide : slide + (N-FOOT+1)]

            #print (B)

            top = 0

            for i in range(N-FOOT+1):
                if A[i+slide] & 1 and (N-FOOT)|i == (N-FOOT):
                    top ^= 1 #(A[i+slide] % 2) * nCr_Lucas(N-FOOT,i,2)

            a_tmp.append(top)

        A = a_tmp

    mod = 2**M

    while len(A) > 1:
        B = []
        for i in range(len(A)-1):
            B.append( (A[i]+A[i+1])**2 % mod )
        A = B

    ANS.append(A[0] % mod)

print (*ANS,sep="\n")