Latest Version for WNDR4500v1 firmware

So trying out the open router project on my older N900 wndr4500v1, it will become the router I will use in my new office.

so I downloaded the firmware I found, and installed it, came up beautifully but I was wondering if that was the final version?

Router information reports:  DD-WRT V24-Sp2 (11/19/14) - build build r25344  (wondering why build is being repeated as well).

any input is appreciated.