1.41 corresponds to the "Smuggler’s Run" update (released late 2017).
Version 1.41 is several years out of date. It will not work for official GTA Online play and may lack modern performance fixes. GTA.V(1.41).part01.rar
You cannot open .part01 without having all other parts (part02, part03, etc.) in the same folder. GTA.V(1.41).part01.rar
.part01.rar indicates this is the first segment of a multi-part split archive . GTA.V(1.41).part01.rar