| user: | cirosantilli |
| created: | April 22, 2014 |
| karma: | 194 |
| about: | Check out: https://OurBigBook.com I am: https://cirosantilli.com Proof: https://cirosantilli.com/accounts |
| 1. | BB(6), The 6th Busy Beaver Number, is harder than a Collatz-like math problem(wiki.bbchallenge.org) |