I found a 5 by picking two Random article pages: Xyloplax turnerae to Pagolo Arsago -- https://www.sixdegreesofwikipedia.com/?source=Xyloplax%20turnerae&target

I found a 5 by picking two Random article pages: Xyloplax turnerae to Pagolo Arsago -- https://www.sixdegreesofwikipedia.com/?source=Xyloplax%20turnerae&target=Pagolo%20Arsago https://www.sixdegreesofwikipedia.com/?source=Xyloplax%20tur... I love all the little touches, like the fun facts (2.51% of Wikipedia articles don't have incoming links) and UI touches ("wipes brow, I really had to work hard for this one").