1547_F. Array Stabilization (GCD version)
You are given an array of positive integers a = [a_0, a_1, ..., a_{n - 1}] (n ≥ 2).

In one step, the array a is replaced with another array of length n, in which each element is the [greatest common divisor (GCD)](http://tiny.cc/tuy9uz) of two neighboring elements (the element itself and its right neighbor; consider that the right neighbor of the (n - 1)-th element is the 0-th element).

Formally speaking, a new array b = [b_0, b_1, ..., b_{n - 1}] is being built from array a = [a_0, a_1, ..., a_{n - 1}] such that b_i = \gcd(a_i, a_{(i + 1) mod n}), where \gcd(x, y) is the greatest common divisor of x and y, and x mod y is the remainder of x dividing by y. In one step the array b is built and then the array a is replaced with b (that is, the assignment a := b is taking place).

For example, if a = [16, 24, 10, 5] then b = [\gcd(16, 24), \gcd(24, 10), \gcd(10, 5), \gcd(5, 16)] = [8, 2, 5, 1]. Thus, after one step the array a = [16, 24, 10, 5] will be equal to [8, 2, 5, 1].

For a given array a, find the minimum number of steps after which all values a_i become equal (that is, a_0 = a_1 = ... = a_{n - 1}). If the original array a consists of identical elements then consider the number of steps is equal to 0.

Input

The first line contains an integer t (1 ≤ t ≤ 10^4). Then t test cases follow.

Each test case contains two lines. The first line contains an integer n (2 ≤ n ≤ 2 ⋅ 10^5) — length of the sequence a. The second line contains n integers a_0, a_1, ..., a_{n - 1} (1 ≤ a_i ≤ 10^6).

It is guaranteed that the sum of n over all test cases doesn't exceed 2 ⋅ 10^5.

Output

Print t numbers — answers for each test case.

Example

Input


5
4
16 24 10 5
4
42 42 42 42
3
4 6 4
5
1 2 3 4 5
6
9 9 27 9 9 63


Output


3
0
2
1
1
```python
#!/usr/bin/env python
#from __future__ import division, print_function
import math
import os
import sys
#from fractions import *
from sys import *
from decimal import *
from io import BytesIO, IOBase
from itertools import accumulate,combinations,permutations,combinations_with_replacement,product
from collections import *
#import timeit,time
#sys.setrecursionlimit(10**5)
#from sortedcontainers import *
M = 10 ** 9 + 7
import heapq
from bisect import *
from functools import lru_cache
from queue import PriorityQueue
# print(math.factorial(5))
if sys.version_info[0] < 3:
    from __builtin__ import xrange as range
    from future_builtins import ascii, filter, hex, map, oct, zip
# sys.setrecursionlimit(10**6)
# region fastio
BUFSIZE = 8192
class FastIO(IOBase):
    newlines = 0

    def __init__(self, file):
        self._fd = file.fileno()
        self.buffer = BytesIO()
        self.writable = "x" in file.mode or "r" not in file.mode
        self.write = self.buffer.write if self.writable else None

    def read(self):
        while True:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            if not b:
                break
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines = 0
        return self.buffer.read()

    def readline(self):
        while self.newlines == 0:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            self.newlines = b.count(b"\n") + (not b)
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines -= 1
        return self.buffer.readline()

    def flush(self):
        if self.writable:
            os.write(self._fd, self.buffer.getvalue())
            self.buffer.truncate(0), self.buffer.seek(0)
class IOWrapper(IOBase):
    def __init__(self, file):
        self.buffer = FastIO(file)
        self.flush = self.buffer.flush
        self.writable = self.buffer.writable
        self.write = lambda s: self.buffer.write(s.encode("ascii"))
        self.read = lambda: self.buffer.read().decode("ascii")
        self.readline = lambda: self.buffer.readline().decode("ascii")
def print(*args, **kwargs):
    """Prints the values to a stream, or to sys.stdout by default."""
    sep, file = kwargs.pop("sep", " "), kwargs.pop("file", sys.stdout)
    at_start = True
    for x in args:
        if not at_start:
            file.write(sep)
        file.write(str(x))
        at_start = False
    file.write(kwargs.pop("end", "\n"))
    if kwargs.pop("flush", False):
        file.flush()
if sys.version_info[0] < 3:
    sys.stdin, sys.stdout = FastIO(sys.stdin), FastIO(sys.stdout)
else:
    sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
def inp(): return sys.stdin.readline().rstrip("\r\n")  # for fast input
def out(var): sys.stdout.write(str(var))  # for fast output, always take string
def lis(): return list(map(int, inp().split()))
def stringlis(): return list(map(str, inp().split()))
def sep(): return map(int, inp().split())
def strsep(): return map(str, inp().split())
def fsep(): return map(float, inp().split())
def inpu(): return int(inp())
# -----------------------------------------------------------------
"""
def regularbracket(t):
    p = 0
    for i in t:
        if i == "(":
            p += 1
        else:
            p -= 1
        if p < 0:
            return False
    else:
        if p > 0:
            return False
        else:
            return True
# -------------------------------------------------
def binarySearchcount(arr, n, key):
    left = 0
    right = n - 1
    count = 0
    while (left <= right):
        mid = ((right + left) // 2)
        # Check if middle element is
        # less than or equal to key
        if (arr[mid] <= key):
            count = mid + 1
            left = mid + 1
        # If key is smaller, ignore right half
        else:
            right = mid - 1
    return count
#--------------------------------------------------binery search
def binarySearch(arr, n, key):
    left = 0
    right = n - 1
    while (left <= right):
        mid = ((right + left) // 2)
        if arr[mid]==key:
            return mid
        if (arr[mid] <= key):
            left = mid + 1
        # If key is smaller, ignore right half
        else:
            right = mid - 1
    return -1
#-------------------------------------------------ternary search
def ternarysearch(arr,n,key):
    l,r=0,n-1
    while(l<=r):
        mid = (-l+r)//3 + l
        mid2 = mid + (-l+r)//3
        if arr[mid]==key:
            return mid
        if arr[mid2]==key:
            return mid2
        if arr[mid]>key:
            r=mid-1
        elif arr[mid2]<key:
            l=mid2+1
        else:
            l=mid+1
            r=mid2-1
    return -1
# ------------------------------reverse string(pallindrome)
def reverse1(string):
    pp = ""
    for i in string[::-1]:
        pp += i
    if pp == string:
        return True
    return False
# --------------------------------reverse list(paindrome)
def reverse2(list1):
    l = []
    for i in list1[::-1]:
        l.append(i)
    if l == list1:
        return True
    return False

def mex(list1):
    l=0
    h=len(list1)-1
    while(l<=h):
        mid=(l+h)//2
        if list1[mid]==mid:
            l=mid+1
        else:
            h=mid-1
    return l
def sumofdigits(n):
    n = str(n)
    s1 = 0
    for i in n:
        s1 += int(i)
    return s1
def perfect_square(n):
    s = math.sqrt(n)
    if s == int(s):
        return True
    return False
# -----------------------------roman
def roman_number(x):
    if x > 15999:
        return
    value = [5000, 4000, 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1]
    symbol = ["F", "MF", "M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"]
    roman = ""
    i = 0
    while x > 0:
        div = x // value[i]
        x = x % value[i]
        while div:
            roman += symbol[i]
            div -= 1
        i += 1
    return roman
def soretd(s):
    for i in range(1, len(s)):
        if s[i - 1] > s[i]:
            return False
    return True
# print(soretd("1"))
# ---------------------------
def countRhombi(h, w):
    ct = 0
    for i in range(2, h + 1, 2):
        for j in range(2, w + 1, 2):
            ct += (h - i + 1) * (w - j + 1)
    return ct
def countrhombi2(h, w):
    return ((h * h) // 4) * ((w * w) // 4)
# ---------------------------------
def binpow(a, b):
    if b == 0:
        return 1
    else:
        res = binpow(a, b // 2)
    if b % 2 != 0:
        return res * res * a
    else:
        return res * res


# -------------------------------------------------------
def binpowmodulus(a, b, M):
    if b==1:
        return a%M
    if b==0:
        return 1
    if b%2==0:
        ans=binpowmodulus(a,b//2,M)
        return (ans*ans)%(M)
    else:
        ans=binpowmodulus(a,(b-1)//2,M)
        return ((ans*a)%M * ans)%M
# -------------------------------------------------------------
def coprime_to_n(n):
    result = n
    i = 2
    while (i * i <= n):
        if (n % i == 0):
            while (n % i == 0):
                n //= i
            result -= result // i
        i += 1
    if (n > 1):
        result -= result // n
    return result


def luckynumwithequalnumberoffourandseven(x,n,a):
    if x >= n and str(x).count("4") == str(x).count("7"):
        a.append(x)
    else:
        if x < 1e12:
            luckynumwithequalnumberoffourandseven(x * 10 + 4,n,a)
            luckynumwithequalnumberoffourandseven(x * 10 + 7,n,a)
    return a
#----------------------
def luckynum(x,l,r,a):
    if x>=l and x<=r:
        a.append(x)
    if x>r:
        a.append(x)
        return a
    if x < 1e10:
            luckynum(x * 10 + 4, l,r,a)
            luckynum(x * 10 + 7, l,r,a)
    return a

def luckynuber(x, n, a):
    p = set(str(x))
    if len(p) <= 2:
        a.append(x)
    if x < n:
        luckynuber(x + 1, n, a)
    return a


# ------------------------------------------------------interactive problems
def interact(type, x):
    if type == "r":
        inp = input()
        return inp.strip()
    else:
        print(x, flush=True)
# ------------------------------------------------------------------zero at end of factorial of a number
def findTrailingZeros(n):
    # Initialize result
    count = 0

    # Keep dividing n by
    # 5 & update Count
    while (n >= 5):
        n //= 5
        count += n

    return count


# -----------------------------------------------merge sort
# Python program for implementation of MergeSort
def mergeSort(arr):
    if len(arr) > 1:
        mid = len(arr) // 2
        L = arr[:mid]
        R = arr[mid:]
        mergeSort(L)
        mergeSort(R)
        i = j = k = 0
        while i < len(L) and j < len(R):
            if L[i] < R[j]:
                arr[k] = L[i]
                i += 1
            else:
                arr[k] = R[j]
                j += 1
            k += 1
        while i < len(L):
            arr[k] = L[i]
            i += 1
            k += 1
        while j < len(R):
            arr[k] = R[j]
            j += 1
            k += 1
# -----------------------------------------------lucky number with two lucky any digits
res = set()
def solven(p, l, a, b, n):  # given number
    if p > n or l > 10:
        return
    if p > 0:
        res.add(p)
    solven(p * 10 + a, l + 1, a, b, n)
    solven(p * 10 + b, l + 1, a, b, n)
# problem
n = int(input())
for a in range(0, 10):
    for b in range(0, a):
        solve(0, 0)
print(len(res))
"""
"""
def subsetsUtil(A, subset, index, d):
    print(*subset)
    s = sum(subset)
    d.append(s)
    for i in range(index, len(A)):
        subset.append(A[i])
        subsetsUtil(A, subset, i + 1, d)
        subset.pop(-1)
    return d
def subsetSums(arr, l, r, d, sum=0):
    if l > r:
        d.append(sum)
        return
    subsetSums(arr, l + 1, r, d, sum + arr[l])
    # Subset excluding arr[l]
    subsetSums(arr, l + 1, r, d, sum)
    return d

def print_factors(x):
    factors = []
    for i in range(1, x + 1):
        if x % i == 0:
            factors.append(i)
    return (factors)
# -----------------------------------------------
def calc(X, d, ans, D):
    # print(X,d)
    if len(X) == 0:
        return
    i = X.index(max(X))
    ans[D[max(X)]] = d
    Y = X[:i]
    Z = X[i + 1:]
    calc(Y, d + 1, ans, D)
    calc(Z, d + 1, ans, D)

def generate(st, s):
    if len(s) == 0:
        return
    if s not in st:
        st.add(s)
        for i in range(len(s)):
            t = list(s).copy()
            t.remove(s[i])
            t = ''.join(t)
            generate(st, t)
    return
#=--------------------------------------------longest increasing subsequence
def largestincreasingsubsequence(A):
    l = [1]*len(A)
    for i in range(1,len(l)):
        for k in range(i):
            if A[k]<=A[i]:
                l[i]=max(l[i],l[k]+1)
    return max(l)
#----------------------------------Function to calculate Bitwise OR of sums of all subsequences
def findOR(nums, N):
    prefix_sum = 0
    result = 0
    for i in range(N):
        result |= nums[i]
        prefix_sum += nums[i]
        result |= prefix_sum
    return result
def OR(a, n):
    ans = a[0]
    for i in range(1, n):
        ans |= a[i]
        #l.append(ans)
    return ans
def toString(List):
    return ''.join(List)
# Function to print permutations of string
# This function takes three parameters:
# 1. String
# 2. Starting index of the string
# 3. Ending index of the string.
def permute(a, l, r,p):
    if l == r:
        p.append(toString(a))
    else:
        for i in range(l, r + 1):
            a[l], a[i] = a[i], a[l]
            permute(a, l + 1, r,p)
            a[l], a[i] = a[i], a[l]  # backtrack
def squareRoot(number, precision):
    start = 0
    end, ans = number, 1
    while (start <= end):
        mid = int((start + end) / 2)
        if (mid * mid == number):
            ans = mid
            break
        if (mid * mid < number):
            start = mid + 1
        else:
            end = mid - 1
    increment = 0.1
    for i in range(0, precision):
        while (ans * ans <= number):
            ans += increment
        ans = ans - increment
        increment = increment / 10
    return ans
def countRectangles(l, w):
    squareSide = math.gcd(l, w)
    return int((l * w) / (squareSide * squareSide))
# Function that count the
# total numbersProgram between L
# and R which have all the
# digit same
def count_same_digit(L, R):
    tmp = 0
    ans = 0
    n = int(math.log10(R) + 1)
    for i in range(0, n):
        # tmp has all digits as 1
        tmp = tmp * 10 + 1
        for j in range(1, 10):

            if (L <= (tmp * j) and (tmp * j) <= R):
                #print(tmp*j)
                # Increment the required count
                ans += 1
    return ans
#----------------------------------print k closest number of a number in an array
def findCrossOver(arr, low, high, x):
    # Base cases
    if (arr[high] <= x):  # x is greater than all
        return high
    if (arr[low] > x):  # x is smaller than all
        return low
    # Find the middle point
    mid = (low + high) // 2
    if (arr[mid] <= x and arr[mid + 1] > x):
        return mid
    if (arr[mid] < x):
        return findCrossOver(arr, mid + 1, high, x)
    return findCrossOver(arr, low, mid - 1, x)
def Kclosest(arr, x, k, n,ans):
    # Find the crossover point
    l = findCrossOver(arr, 0, n - 1, x)
    r = l + 1
    count = 0
    if (arr[l] == x):
        l -= 1
    #print(l)
    while (l >= 0 and r < n and count < k):
        if (x - arr[l] < arr[r] - x):
            ans.append(arr[l])
            l -= 1
        else:
            ans.append(arr[r])
            r += 1
        count += 1
    while (count < k and l >= 0):
        ans.append(arr[l])
        l -= 1
        count += 1
    while (count < k and r < n):
        ans.append(arr[r])
        r += 1
        count += 1
    return ans


def dfs(root,nodeVal,nodeConnection,visited):
    leftVal = nodeVal[root][0]
    rightVal = nodeVal[root][1]
    solution = []
    if nodeConnection[root]:
        visited.add(root)
        for i in nodeConnection[root]:
            if i not in visited:
                solution.append(dfs(i,nodeVal,nodeConnection,visited))
        leftMax = 0
        rightMax = 0
        for i in solution:
            l, r = i
            leftMax += max(abs(leftVal - l[0]) + l[1], abs(leftVal - r[0]) + r[1])
            rightMax += max(abs(rightVal - l[0]) + l[1], abs(rightVal - r[0]) + r[1])
        return ((leftVal, leftMax), (rightVal, rightMax))
    else:
        return ((leftVal, 0), (rightVal, 0))

"""
def luckynumber(x,n,a):
    if x >0:
        a.append(x)
    if x>10**9:
        return a
    else:
        if x < 1e12:
            luckynumber(x * 10 + 4,n,a)
            luckynumber(x * 10 + 7,n,a)
def lcm(a,b):
    return (a*b)//math.gcd(a,b)

def query1(l, r):
    if l >= r:
        return -1
    print('?', l + 1, r + 1)
    sys.stdout.flush()
    return int(input()) - 1
def answer(p):
    print('!', p + 1)
    sys.stdout.flush()
    exit()

#---------------------count number of primes
"""
import math
MAX = 10**5
prefix = [0] * (MAX + 1)
def buildPrefix():
    prime = [1] * (MAX + 1)
    p = 2
    while (p * p <= MAX):
        if (prime[p] == 1):
            i = p * 2
            while (i <= MAX):
                prime[i] = 0
                i += p
        p += 1
    for p in range(2, MAX + 1):
        prefix[p] = prefix[p - 1]
        if (prime[p] == 1):
            prefix[p] += 1
def query(L, R):
    return prefix[R] - prefix[L - 1]
#buildPrefix()

def maxSubArraySum(a, size):
    max_so_far = a[0]
    curr_max = a[0]
    for i in range(1, size):
        curr_max = max(a[i], curr_max + a[i])
        max_so_far = max(max_so_far, curr_max)
    return max_so_far

def solvepp(n,k):
    if n==1 and k==1:
        return 0
    mid=(2**(n-1))//2
    if k<=mid:
        return solvepp(n-1,k)
    else:
        return solvepp(n-1,k-(mid))==0

#------------------print subset of strings
def solvr(s,p):
    if len(s)==0:
        print(p,end=" ")
        return
    op1=p
    op2=p+s[0]
    s=s[1:]
    solvr(s,op1)
    solvr(s,op2)
    return
#-------------------------------------balanced paranthesis
def paranthesis(n,m,ans,l):
    if n==0 and m==0:
        print(ans)
        return
    if n!=0:
        op1=ans+"("
        paranthesis(n-1,m,op1,l)
    if m>n:
        op2=ans+")"
        paranthesis(n,m-1,op2,l)
"""
"""
class node:
    def __init__(self,data):
        self.data=data
        self.next=None
class linkedlis:
    def __init__(self):
        self.head=None
    def printlis(self):
        temp=self.head
        while(temp):
            print(temp.data,end=" ")
            temp=temp.next
    def pushfirst(self,new_data):
        new_node=node(new_data)
        new_node.next=self.head
        self.head=new_node
    def pushmid(self,previous_node,new_data):
        new_node=node(new_data)
        if previous_node==None:
            print("call pushfirst function if it is the the start otherwise raise an error.")
        new_node.next=previous_node.next
        previous_node.next=new_node
    def pushlast(self,new_data):
        new_node=node(new_data)
        if self.head==None:
            self.head=new_node
            return
        last=self.head
        while(last.next!=None):
            last=last.next
        last.next=new_node
    def delete_node(self,key):
        pass
if __name__ == '__main__':
    l=linkedlis()
    l.head= node(1)
    p = node(2)
    pp = node(4)
    l.head.next = p
    p.next = pp
    #print(l.head)
    l.pushmid(p, 3)
    l.pushlast(5)
    l.pushfirst(0)
    #l.printlis()
    #print(l.head.data)
"""

def rse(arr,n):
    stack=[]
    ans=[]
    for i in range(n-1,-1,-1):
        if len(stack)==0:
            ans.append(n)
        else:
            while(len(stack)!=0):
                if stack[-1][0]>=arr[i]:
                    stack.pop()
                else:
                    break
            if len(stack)==0:
                ans.append(n)
            else:
                ans.append(stack[-1][1])
        stack.append([arr[i],i])
    ans.reverse()
    return ans

def lse(arr,n):
    stack=[]
    ans=[]
    for i in range(n):
        if len(stack)==0:
            ans.append(-1)
        else:
            while(len(stack)!=0):
                if stack[-1][0]>=arr[i]:
                    stack.pop()
                else:
                    break
            if len(stack)==0:
                ans.append(-1)
            else:
                ans.append(stack[-1][1])
        stack.append([arr[i],i])
    return ans

def mah(arr):
    max1=0
    p=rse(arr,len(arr))
    q=lse(arr,len(arr))
    for i in range(len(arr)):
        a=(p[i]-q[i]-1)*arr[i]
        max1=max(a,max1)
    return max1
"""
def lcs(s,r):
    rr=len(r)
    ss=len(s)
    l=[[0]*(rr+1) for i in range(ss+1)]
    for i in range(1,ss+1):
        for j in range(1,rr+1):
            if s[i-1]==r[j-1]:
                l[i][j]=l[i-1][j-1]+1
            else:
                l[i][j] =max(l[i-1][j],l[i][j-1])
    return l[ss][rr]


def subsetsum(arr,sum,len):
    dp=[[False]*(sum+1) for i in range(len+1)]
    for i in range(len+1):
        dp[i][0]=True
    for i in range(1,len+1):
        for j in range(1,sum+1):
            #print(dp[i][j])
            if arr[i-1]>j:
                dp[i][j]=dp[i-1][j]
            else:
                dp[i][j]=dp[i-1][j] or dp[i-1][j-arr[i-1]]
    return dp[len][sum]
"""
"""
def matrixmincost(cost,n,m):
    dp = [[0 for x in range(m)] for x in range(n)]
    for i in range(n):
        for j in range(m):
            if i==0 and j==0:
                dp[i][j]=cost[i][j]
            elif i==0 and j!=0:
                dp[i][j]=dp[i][j-1]+cost[i][j]
            elif j==0 and i!=0:
                dp[i][j]=dp[i-1][j]+cost[i][j]
            else:
                dp[i][j] = cost[i][j] + min(dp[i-1][j],dp[i][j-1],dp[i-1][j-1])
    #print(dp)
    return dp[n-1][m-1]
"""
#--------------------------adding any number to get a number
"""
def coinchange(n,arr,len1):
    dp=[0]*(n+1)
    dp[0]=1
    for i in range(len1):
        for j in range(arr[i],n+1): 
            dp[j]+=dp[j-arr[i]]
    return dp[n]
"""
"""
class Graph(object):
    def __init__(self, vertices):
        self.graph = defaultdict(list)
        self.V = vertices
    def addEdge(self, u, v):
        self.graph[u].append(v)
        self.graph[v].append(u)
    def connectedComponents(self):
        unvisited = set(range(self.V))
        queue = deque()
        count = 0
        while len(unvisited) > 0:
            count += 1
            v = next(iter(unvisited))
            unvisited.remove(v)
            queue.append(v)
            while len(queue) > 0:
                v = queue.popleft()
                for w in self.graph[v]:
                    if w in unvisited:
                        unvisited.remove(w)
                        queue.append(w)
        return count
"""
def maxSumIS(arr, n):
    msis=arr.copy()
    for i in range(1, n):
        for j in range(i):
            if (arr[i] > arr[j] and
                    msis[i] < msis[j] + arr[i]):
                msis[i] = msis[j] + arr[i]
    c=max(msis)
    p=5
    return c
#--------------------------------find the index of number in sorted array from behind
def binarysearch2(arr,target):
    lo=0
    hi=len(arr)-1
    while(lo<=hi):
        mid=(lo+hi)//2
        #print(arr[mid],arr[mid-1],mid)
        if arr[mid]==target:
            if mid!=len(arr)-1:
                if arr[mid+1]!=target:
                    return mid
                else:
                    lo+=1
            else:
                return mid
            continue
        if arr[mid]>target:
            hi=mid-1
        else:
            lo=mid+1
def ngr(arr,n):
    stack=[]
    ans=[]
    for i in range(n-1,-1,-1):
        if len(stack)==0:
            ans.append(-1)
        else:
            while(len(stack)>0):
                if stack[-1][0]<arr[i]:
                    stack.pop()
                else:
                    break
            if len(stack)==0:
                ans.append(-1)
            else:
                ans.append(stack[-1][1])
        stack.append([arr[i],i])
    ans.reverse()
    return ans

def alperm(nums, path,result):
    if not nums:
        result.add(tuple(path))
        return
    for i in range(0,len(nums)):
        alperm(nums[:i] + nums[i + 1:], path + [nums[i]],result)
    return result
#p=float("inf")
def minsum(arr,n,m,res,l):
    if n==1 and m==1:
        res+=arr[0][0]
        l.append(res)
    else:
        if n!=1:
                p=res+arr[n-1][m-1]
                minsum(arr,n-1,m,p,l)
        if m!=1:
                p=res+arr[n-1][m-1]
                minsum(arr,n,m-1,p,l)
    return min(l)

def subset(arr,n,ans,c):
    if n==0:
        print(c)
        ans.add(tuple(sorted(c)))
        return
    else:
        op=c+[arr[n-1]]
        subset(arr,n-1,ans,op)
        subset(arr,n-1,ans,c)
"""
nums=[5,2,6,1]
ret = [0] * len(nums)
sl = SortedList()
for i in range(len(nums) - 1, - 1, - 1):
    ret[i] = sl.bisect_left(nums[i])
    sl.add(nums[i])
print(ret)
"""
def catalan(n):
    if (n == 0 or n == 1):
        return 1
    catalan = [0] * (n + 1)
    catalan[0] = 1
    catalan[1] = 1
    for i in range(2, n + 1):
        for j in range(i):
            catalan[i] += catalan[j] * catalan[i - j - 1]
    return catalan[n]

def isP(p,i,j):
    if j<=i:
        return True
    if p[i]!=p[j]:
        return False
    return isP(p,i+1,j-1)
"""
class Node:
    def __init__(self, data):
        self.data = data
        self.left = None
        self.right = None
def leftViewUtil(root, level, max1):
    if root is None:
        return
    if max1[0]<level:
        print(root.data)
        max1[0]=level
    leftViewUtil(root.left, level + 1, max1)
    leftViewUtil(root.right,level+1,max1)
def leftView(root):
    max1 =[0]
    leftViewUtil(root, 1, max1)
root = Node(10)
root.left = Node(2)
root.right = Node(3)
root.left.left = Node(7)
root.left.right = Node(8)
root.right.right = Node(15)
root.right.left = Node(12)
root.right.right.left = Node(14)
#root.left.left.right=Node(15)
max1=-1
leftView(root)
"""
"""
def find_shortest_path(graph, start, end, path=[]):
    path = path + [start]
    if start == end:
        return path
    if start not in graph:
        return None
    shortest = None
    for node in graph[start]:
        if node not in path:
            newpath = find_shortest_path(graph, node, end, path)
            if newpath:
                if not shortest or len(newpath) < len(shortest):
                    shortest = newpath
    return shortest
"""
def main():
    t=1
    t=inpu()
    for _ in range(t):
        n=inpu()
        arr=lis()
        res=0
        if len(set(arr))==1:
            print(0)
            continue
        arr+=arr
        m = 0
        for i in range(n):
            k1 = arr[i]
            k2 = arr[i + 1]
            c=0
            j=i+1
            while (k1 != k2):
                k1=math.gcd(k1, arr[j])
                k2=math.gcd(k2, arr[j + 1])
                j += 1
                c += 1
                #print(str(j)+"-------------")
            m = max(m, c)
        print(m)
if __name__ == '__main__':
    main()

```