Introducing Ramanujan's Class Polynomials in the Generation of Prime   Order Elliptic Curves
  In this paper, we propose the use of Ramanujan class of polynomials for the construction of prime order elliptic curves using the CM-method. We compare (theoretically and experimentally) the efficiency of using this new class against the use of the Weber, $M_{D,l}(x)$ and $M_{D,p_1,p_2}(x)$ polynomials and show that they clearly outweigh all of them in the generation of prime order elliptic curves. 
Elisavet Konstantinou, Aristides Kontogeorgis