Need for paper & pencil with 48/49/50 calculators

[ttw]

The main thing I found was that I could do bigger computations than with pencil and paper. The CAS helped. One of the latest examples is that I can find a large (about 2 ^60) Sophie Germaine prime with a second number so that A/P has small partial quotients as a continued fraction. It takes a couple of minutes on the HP50g; and a few seconds on EMU48 on an S22U phone.

I like to go through a simple example of all my big math programs on a calculator (not by hand anymore). It helps avoid bad side paths when programming.