Facebook estimates it has over 100 million fake accounts in use

During Facebook's Q4 earnings report, we found out that there are over 1.23 billion monthly active users, 757 million daily active users, 945 million monthly active mobile users, and 556 million daily active mobile users.

These are some interesting numbers, but just how many of these Facebook accounts are fake? The social network says that at least 67.65 million fake accounts were used last month alone, with this number exploding out to as high as 137.76 million accounts, if its higher-end estimate is to be believed.

Facebook estimates that in 2013, between 5.5% and 11.2% of its total users, were fake. It's a huge number, but not totally surprising.