@all - sorry for the incommunicado, but I'm currently on vacation with only sporadic access to Internet
@AlexTP - I'll provide more feedback on the remaining packages once back from vacation (end of August)
@SymbolicFrank - I intended to also provide a general summary from my perspective once I did all the packages individually. I'll also take a special look again wrt usability for encryption. But that is a broad topic in itself and requires a lot more, than general arbitrary precision arithmetics ...
@ad1mt - I will of course also take a look at FNX, but as stated before, my expertise is algorithms not OOP. I can see if a package comes with class wrapper and operator overloading (and I think I commented on that in my first two analysis), but I'm at a loss to judge versatility/portability of these.