#素因数分解
def Prime_Factorization(N):
    if N<0:
        R=[[-1,1]]
    else:
        R=[]

    N=abs(N)
    k=2
    while k*k<=N:
        if N%k==0:
            C=0
            while N%k==0:
                C+=1
                N//=k
            R.append([k,C])
        k+=1

    if N!=1:
        R.append([N,1])
    if not R:
        R.append([N,1])

    return R

#Euler's Totient関数
def Euler_Totient(N):
    N=abs(N)
    if N==1:
        return 1

    H=Prime_Factorization(N)
    R=1
    for (p,e) in H:
        R*=p**(e-1)*(p-1)
    return R

#約数全部
def Divisors(N):
    N=abs(N)
    L,U=[],[]
    k=1
    while k*k <=N:
        if N%k== 0:
            L.append(k)
            if k!=N//k:
                U.append(N//k)
        k+=1
    return L+U[::-1]
#================================================
T=int(input())

X=[0]*T
for i in range(T):
    N=int(input())
    M=2*N-1

    D=Euler_Totient(M)
    L=Divisors(D)

    ans=-1
    for a in L[::-1]:
        T=pow(2,a,M)
        if (T-1)%M==0:
            ans=a
    X[i]=ans

print("\n".join(map(str,X)))