Don’t know why I’ve overlooked it before. I had read that it was a language associated with Second Life and primarily interesting because of its multithreaded support. Well I have always hated multiprocessors and their get, and assuming this was something like like a Java scripting language gave it a miss. A big mistake, it doesn’t support multiprocessing but rather coroutines which are a favourite of mine.

I have added a lua to my compendium of implementations of the sieve of eratosthenes.