The eclib package includes mwrank (for 2-descent on elliptic curves over Q) and modular symbol code used to create the elliptic curve database.
copied from cf-staging / eclibconda install conda-forge::eclib
conda install conda-forge/label/cf201901::eclib
conda install conda-forge/label/cf202003::eclib
conda install conda-forge/label/gcc7::eclib