Watching this now. I love anti-prime numbers: They rule our lives and our assumptions about a lot of things because we’re raised with them, generation after generation, as integral parts of how we think things work.

5040 and other Anti-Prime Numbers – Numberphile via https://www.youtube.com/attribution_link?a=V487kZSew5I&u=%2Fwatch%3Fv%3D2JM2oImb9Qg%26feature%3Dshare