Quote:
Originally Posted by Batalov
This has no generality.
This means that q = 3 Mod (p1). Which is a very poor choice of q tightly tied to p.
Even if you can solve it, it is of no practical interest. In ciphers, p and q will never be chosen like that.

Maybe the purpose is to be a backdoor for a cryptosystem where p and q are designed to be randomly selected?