“…This is the major obstacle in solving the cases for large number of variables. Nevertheless, from the process of determining R (2) n (p) and R (3) n (p) presented in this paper, we believe that for any integers n ≥ 3 and 1 ≤ m < n, there exist some rational numbers c a1,a2,...,a k and d a1,a2,...,a k such that for any prime p > n + 2 and r ≥ 2, we have For n ≤ 7, this has already been verified from Theorems 1 and 2 and the work of [4], [9] and [10]. For n ≥ 8, we are able to guess what the congruence should look like.…”