Hello vjudeu,
You answered several questions, thank you.
I was not planning on graphing with the GUIs, just displaying a few iterations and some of the intermediate values.  For example, when I set k, which I find to be the private key, to a few low values such as 2 and 4, then walk through to get the public address.
I checked Sage and it looks good.  There are also a few sites that do the specific calculations on line, such as private to public.  I will use them also.

Next step is to install both Ruby and Python and code a few modules in each to see how they feel.  Maybe just code up a GUI and display a few numbers to get that feel.

So, again, thank you,
And thank you to everyone in the thread for your time and patience.

Just an interesting side note:  I read and see for myself how nasty so many interactive forums get, such as X.  Part of it is the anonymous concept.  But in forums like this, everyone is so incredibly helpful and courteous.  That former part of human nature is really disappointing and often discouraging.  But this part of human nature, here, displayed to just small audiences, is quite encouraging.
Thank you again for your kindness.