It is with great pleasure that the arithmoi maintainers (andrew lelechenko and myself) would like to share the 0.4.2.0 release with the haskell community. This release https://hackage.haskell.org/package/arithmoi-0.4.2.0 includes a multiplicatively infinite (but addititively finite) increase in test coverage and correspondingly every known bug in arithmoi has been fixed (so theres no known crashing/faulting bugs, and all tested code gives mathematically correct answers) I would especially like to thank Andrew Lelechenko for becoming a fellow maintainer, his incredibly meticulous, clean, thorough engineering is really what made this release possible and excellent. this should treated as a stable library version release.