[url=https://mathlesstraveled.com/2012/10/05/factorization-diagrams/]Factorization_diagrams[/url] are depictions of numbers using dots[br]but grouped by factors. They were invented by PhD student Brent Yorgey.[br]This a slightly simplified version of his algorithm.[br][br]See also: [url=https://www.geogebra.org/m/nSTf22Hs]Just for fun[/url]  and my "Context Free" version: [url=https://www.contextfreeart.org/gallery/view.php?id=3493]Factorization Diagrams[/url]