Other religions have published proof of their numbers.
I agree with goldenrule, that the true number is about 1/4 of what they claim. All of us know quite a few Mormons who are inactive, jack Mormon, name-only Mormons, or whatever they want to call it. We also know plenty of Mormons who have left the church, but were granted only name-removal from the rolls. We know all of the above are still counted as members.
All of the above are counted until they are 110 years old--WTF?
Probably infants who are blessed and are not yet baptized are counted, too.
OK, so let's give them a generous 1/3. That's 4.7 million. What percentage is that? Anybody?
I'm not good at numbers, and my mind is boggled by the number 7 billion!!!! And idiot Mormons still believe in multiplying as much as possible!