Hacker News
- TREE vs. Graham’s Number [video] https://www.numberphile.com/videos/tree-v-grahams-number 29 comments
- Almost all numbers contain the digit “3” [video] http://www.numberphile.com/videos/three.html 67 comments
- The Happy Ending Problem [video] http://www.numberphile.com/videos/happy_ending.html 17 comments