Most mind-blowing program for your favorite calculator

[Dan C]

(06-19-2022 06:06 PM)xerxes Wrote:  The most challenging program on my very first programmable calculator, the FX-180P, was the Collatz conjecture. First I thought, that it's not possible to write a program
for the output of the number of interations and the maximum. But after some effort I managed to do it.

I must try this, the FX-180P was my first real technical calculator!
I used it in the "Gymnasiet" in Sweden, and FX-180P was a very popular machine in Sweden at that time.
I have the FX-180P still, and its in a good working condition.

edit: Isnt the FX-180P the same machine as the FX-3600P, but in a different housing?