I've noticed that numerology is a very good indicator of the hidden power of certain domain names, and XENFORO.com adds up to 11, which is a master number and as such very auspicious. If you think that numerology applied to domain names is bull****, take a moment to analyze ANY successful domain, you will see that almost invariably they add up to 1 (the number of the leader) or 11 (an inspired master number, Google.com for instance has it).