Being Able to Put Page Numbers for Users

Hi, I've been reading another user's whole message history as a part of a challenge to find a hidden message.

Anyway, I've noticed that you can't put a page number, you just have to keep pressing the arrows. Which for users who don't talk much is fine. But for people that do talk a lot this becomes really slow. It takes me 3 seconds in order to switch to a new page, and with 3100 pages of messages(and growing), it would take 155 minutes in order to get to the newest message http://prntscr.com/tbivp4 

My suggestion is to add a way to go to a certain page without just pressing the arrow key over and over and over again.