Probing the Fediverse

I working on a small project, and as part of it I need to know if a Fediverse instance in live.  
Some python scripting later and it is regularly probing every fediverse instance.  An interesting exercie.

Currently, the stats are:

72,098 known servers
25,273 are dead
24,210 are erroring
22,615 are alive

Also, the longest server name I have found is 244 characters long. 🤯