Setting upperbound limits to some questions.

* metadata prompts some warnings now, for dummy informations in certificate,
 plus keylength deprecations.
* p-1 is upper-bounded to 1000 primes now, as with the first primes list;
* p+1 is upper-bounded to 1000 primes now, as with the first primes list;
* standard version of pollard's ρ is no more listed.