Calculate the Jacobi symbol (a/b) with the Kronecker extension (a/2)=(2/a) when a odd, or (a/2)=0 when a even
Kalkulatu Jacobi ikurra (a/b) Kronecker luzapenarekin (a/2)=(2/a) bakoitia denean, edo (a/2)=0 bikoitia denean