If you cannot run Minecraft 1.16.5 on your 32-bit PC, consider lightweight alternatives: (open source), Classicube (Minecraft Classic revival), or upgrading to a 64-bit system (even an old $50 used PC from 2012+ supports 64-bit).
You must use the launcher method above. Warning to the reader: Avoid any website offering a direct download for “Minecraft 11951 de 32 bits link.” These files almost always contain trojans. Always verify file hashes against Mojang’s official object database ( piston-data.mojang.com ). minecraft 11951 de 32 bits link
After extensive research across Mojang’s official version manifests, the Minecraft Wiki, and community archives (such as BetaCraft and Omniarchive), the string 11951 does not correspond to a valid client version, build number, or protocol revision. It appears to be a typo, a mis-typed folder name from a corrupted launcher, or a mislabeled file from a third-party repack website. If you cannot run Minecraft 1