Congruences involving (2kk)2(3kk)

Let p>3 be a prime, and let m be an integer with p∤m. In this paper, based on the work of Brillhart and Morton, by using the work of Ishii and Deuringʼs theorem for elliptic curves with complex multiplication we solve some conjectures of Zhi-Wei Sun concerning ∑k=0p−1(2kk)2(3kk)/mk(modp2).