# Does QuadraticField use any special algorithms for computing the class group of quadratic imaginary number fields?

I need to compute the class group of a quadratic imaginary number field that has a fairly large discriminant (over 96 bits.) I was wondering what, if any, algorithms the QuadraticField class uses for computing the class group.

This is most probably delegated to pari/gp

See the doc of qfbclassno in http://pari.math.u-bordeaux.fr/dochtm...