This means if someone could name 24 "prophecies that can scientifically/historically be proven false" then you feel safe and will continue believing but not if someone names 25?

That's a really strange kind of believe. Sound like if quantity is more important for you than quality.

Are you a hardcore believer? Then only one false proven prophecy must destroy your believe?

Or are you a very unsure believer? Then it's pointless how much prophecies could be proven wrong.