Facebook says it disabled nearly 1.3 billion fake accounts in the six months through March.
Had the company failed to do so, its monthly user base would have swelled beyond its current 2.2 billion.
Even after all that disabling, though, Facebook has said that 3 percent to 4 percent of its active monthly users are fake, meaning up to 88 million fake accounts slip through.
Fake accounts have gotten more attention in recent months after it was revealed that Russian agents used them to buy ads to try to influence the 2016 elections.
The numbers were disclosed in a report Tuesday that breakdown how much material Facebook removes for violating service terms.