Adding the number 4 to the end of Facebook’s website URL will automatically direct you to Mark Zuckerberg’s wall.
Website URL: www.facebook.com/4
Not sure why Zuckerberg chose the fourth ID number instead of number 1, but this is a quick and easy way to get to the original Facebook wall that is owned by its creator.
Adding the numbers 5 or 6 to the end of the URL will take you to the respective profiles of Chris Hughes and Dustin Moskovitz, Facebook co-founders and Mark’s former college roommates.
Tacking a 7 onto the web address leads to the profile of Arie Hasit, another good friend of Zuckerberg from his days at Harvard.