Thanks ! I was suprised it wasn't on OEIS yet. I'm glad that such autistic idea came to someone else too.

Just link the video that completely coincidentally was released at the same time as the kata https://www.youtube.com/watch?v=c066hLi78B0

.

Or maybe not. Whatever, your kata, not my responsibility, precompute 10001 fixes it.

Sorry, don't think it's an off-by-one error actually, I think this

        while p * p < n:

should have an <= instead of a <.

The reference solution itself has an off-by-one error for the upper bound

Is it correct? It seems to have invalidated every solution.

added

IDK, is another prime kata considered original enough these days?..

(quickly adding a new submission)

Could do with a fixed test for n = 10_000.

Someone with an off-by-one error on the upper bound probably won't be caught by the random tests.

I quite like this, but I think the description needs to be clearer. Perhaps include an example?

I see, thx

a beta kata gets unpublished automatically when receiving two open issues

Now it's published :)