#pragma GCC optimize(2)
#pragma GCC optimize(3)
#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define debug(x) cout << #x << "=" << x << endl
//using i128 = __int128_t;
#define int long long
typedef pair<int,int> PII;
typedef long long ll;
inline void read(int &x){
    char ch=getchar();int f=1;x=0;
    while(!isdigit(ch) && ch^'-') ch=getchar();
    if(ch=='-') f=-1,ch=getchar();
    while(isdigit(ch)) x=x*10+ch-'0',ch=getchar();
    x*=f;
}
void write(int x){
    if(x<0)
    putchar('-'),x=-x;
    if(x>9)
    write(x/10);
    putchar(x%10+'0');
    return;
}
int n,k;
void rCL(){
     cin>>n>>k;
     vector<int>a(n+1);
     int mx=2e9;
     for(int i=1;i<=n;i++){
         cin>>a[i];
         mx=min(mx,a[i]);
     }
     if(n==1){
         cout<<k<<' ';
         cout<<(1+k)*k/2<<endl;
         return ;
     }
     int g=a[2]-a[1];
     for(int i=3;i<=n;i++){
         g=gcd(g,a[i]-a[i-1]);
     }   
     //cout<<g<<endl;
     int res=0;
     int cnt=0;
     map<int,int>mp;
     for(int i=1;i<=sqrt(g);i++){
         if(g%i==0){
             int a=i;
             int b=g/i;
             if(a==b){
                 if(!mp[a-mx]&&a-mx>0&&a-mx<=k){
                     mp[a-mx]=1;
                     res+=a-mx;
                     cnt++;
                 }
             }else{
                 if(!mp[a-mx]&&a-mx>0&&a-mx<=k){
                     mp[a-mx]=1;
                     res+=a-mx;
                     cnt++;
                 }
                 if(!mp[b-mx]&&b-mx>0&&a-mx<=k){
                     mp[b-mx]=1;
                     res+=b-mx;
                     cnt++;
                 }
             }
         }
     }
     cout<<cnt<<' ';
     cout<<res<<endl;
}
signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
    int O_o;
    cin>>O_o;
    while(O_o--){
        rCL();
    }
}