Little explorations with HP calculators (no Prime)

[pier4r]

Thanks for sharing (I'll have to check more the article from J.H.), yes it is pretty similar to what I thought as second idea. Would be interesting is someone has some other approaches (apart from ROLL ROLLD or even those but with subtle optimizations).

Actually with my shuffle I'm fine, the only point I started to be concerned "how many shuffles do I have to do to have a random order compared to the one from the start?"

Something like this https://www.youtube.com/watch?v=AxJubaijQbI (forgive me for the video, but it is interesting, check at least the first 45 seconds, there are also links to papers in the description)