The 49999th forrum member's public profile: http://www.lfsforum.net/member.php?u=921235. Does the number 92123 represent the UserID, meaning there are 921235 registered LFS accounts?
u=1 is Victor.
u=2 is not a dev
Also entering random numbers (between 1 and 921235) does not always bring up profile (meaning that the specific user has not created a forum account yet?)