Facebook: 50 fascinating facts about Facebook. How long have you been using Facebook for? Any surprises below? Facebook has 845 million monthly active users globally (December 2011). Half of them logging on daily. Facebook has 483 million daily users globally (December 2011) – a 48% increase from the previous year. Mobile accounts for half of Facebook’s user base, with 425 million active monthly users (December 2011). Mobile monthly active users grew...