BuddyPress.org

It’s hard coded in several different places in the code. There isn’t any one spot to just plug in a new number. If you really need to do it, they all seem to be in bp-wire-templatetags.php. That was just a quick look to see what was going on. It may be elsewhere also.

You’ll have to change all the pagination code to reflect a new number. Personally speaking, I’d just live with it for now. You could always post an enhancement ticket in trac and slip Andy some hockey tickets.