On sites like Nexus Mods, 1.6.640 is colloquially called "AE" (Anniversary Edition) because it uses the post-2021 update architecture, even if you haven't purchased the extra Creation Club content. Why Play This Version Today?
In this context, verification likely means that a player's system has been tested and confirmed to run the game smoothly at a certain level of performance. This could involve: skyrim special edition 16640 verified