Here's a solution in k, that uses a similar array oriented approach: &2=+/~x!/:\:x:!100 I wrote a little explanation of it, in case anyone is curious ab

Here's a solution in k, that uses a similar array oriented approach: &2=+/~x!/:\:x:!100 I wrote a little explanation of it, in case anyone is curious about how it works: https://github.com/kidd/arraylangs-index/blob/master/notebooks/kprimes.ipynb https://github.com/kidd/arraylangs-index/blob/master/noteboo...