The author explores which npm package has the largest version number, ultimately finding that the package "latentflip-test" claims an enormous version of 1000000000000000000.1000000000000000000. However, after filtering for packages that genuinely follow semantic versioning, the real winner is "all-the-package-names" with a version of 1.3905.0, highlighting the quirks of npm versioning practices. The article also details the process of fetching and analyzing package data using the npm API.