The order of the Dirichlet series of the elliptic curve at s=1 is of interest to everyone. Mazur, Tate, and Teitelbaum found a way to calculate whether the Dirichlet series of the twisted elliptic curve has a zero at the particular point s=1. This involves calculating the modulo symbol. The aim of this paper is to sort out the methods they have given, and at the same time propose a complete list of algorithms to calculate whether the Dirichlet series of the twisted elliptic curve has a zero at the special point s=1.