Distribution of Primes 2

This is a chart of how the primes are distributed. Builds off a square visualization here:[br][url]http://www.geogebratube.org/material/show/id/117159[/url][br][br]What patterns do you notice? Where do primes happen?[br][br]Some interesting values of n to try: 4, 6, 10 and prime.
Distribution of Primes 2

Information: Distribution of Primes 2