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


T = I()
mod = 10**9+7
for _ in range(T):
    X,K = MI()
    if X == 0:
        print(0)
        continue
    a = pow(K,(mod-1)//2-2,mod-1)
    print(pow(X,a,mod))