[This question](https://math.stackexchange.com/questions/23105/how-many-10-digit-primes-are-there#comment-50124) seems to be generating a fair bit of heat (e.g. flags).

I'm confused. It seems that the question has been through a few revisions on sister sites, which presumably explains why some of the answers have to do with things like passwords and bank security, neither of which is mentioned in the question. I'm not entirely sure what the OP is trying to ask, or exactly what the mild scuffle in the comments is about (and consequently I'm not sure what the appropriate moderator reaction is). Can anyone fill me in?

**Edit:** The oldest version of this question that I can find (on the security SE site) is the [following](https://security.stackexchange.com/revisions/50234b4f-6c1c-4ac8-80d9-49bc42e6bb68/view-source):

> 
> Suppose a bank provides 10-digit password to customers. Of how many primes it should consist of to be the most secure?
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>