What is done to generate a pseudo-random number on the TI-83+?

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Summary:

I just want to know exactly what happens to the number stored in rand when generating a "random" number.

What is done to generate a pseudo-random number on the TI-83+?

mathsman502 31 Aug 2020 22:02

Exactly what happens to the number in rand when generating a pseudo-random number? Like, what exact equations are done to get from Number A to Number B? I know it would probably be in ROM somewhere, so I put this in the off-topic discussion, but I'm somewhat fascinated on whether this sequence of operations would be possible (or easy) to replicate.

Re: What is done to generate a pseudo-random number on the TI-83+?

Trenly 01 Sep 2020 02:50

If you read the page on the rand command, it states that L'Ecuyer's Algorithm is used

Re: What is done to generate a pseudo-random number on the TI-83+?

mathsman502 01 Sep 2020 19:34

Thanks! I didn't see that on the rand page, but I guess that means I didn't look closely enough. Anyway, thanks for pointing that out!

Re: What is done to generate a pseudo-random number on the TI-83+?

Xeda Elnara 01 Sep 2020 11:34

As well, randSeed has code for it (in 68k BASIC, but it can be adapted to the 83+/84+ calcs).

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Re: What is done to generate a pseudo-random number on the TI-83+?

mathsman502 01 Sep 2020 19:35

I'll be sure to check it out! Thanks!