The Julia version was a literal translation of the Python version, the only difference being that I changed the entry point in the Julia version to allow restarting searches in different ranges. That made parallelization very easy, which is where I got most of time saved. I distributed the work across 3 machines. However, even without parallelization, the Julia version progressed <i>much</i> further than either CPython or PyPy. I also attempted a C version before Julia, but I ran into some issues, which Julia handled without me having to write extra code (int128 support out of the box, and various functions for prime numbers). The int128 support was the main reason I didn&#x27;t write it in C, as I came across a lot of contradictory information online for __int128 in Clang or GCC.