#include <bits/stdc++.h>
using namespace std;
int main()
{
int t;
cin >> t;
while(t--)
{
int n;
cin >> n;
int arr[n];
int len = 0;
std::vector<int> v;
for(int i = 0; i<n; i++)
{
cin >> arr[i];
if(i == 0 || __gcd(arr[i],arr[i-1])==1)
{
v.push_back(1);
len++;
}
else
v[len-1]++;
}
int flag = 0;
if(len > 1 && __gcd(arr[0],arr[n-1]) > 1)
{
v[0] += v.back();
v.pop_back();
}
if(len == 1 && __gcd(arr[0],arr[n-1]) > 1)
{
flag = 1;
}