RPL second impressions (HP 28)

[Thomas Klemm]

(06-28-2018 08:48 PM)mdunn Wrote:  Yours is faster too.

Algebraic expressions tend to be slow. Avoid them like the plague.

Quote:HP50g? No idea... Send me one

Never had one. Somehow stopped at the HP-48GX.
But similar functions exist e.g. on the WP-34S:

• PRIME?
• NEXTP
  

You can't really know that the initial number is a prime if you only have NEXTP.
Thus you need PRIME? at least for the first check:
PRIME?
NEXTP
NEXTP
NEXTP
(...)

Quote:I was a bit shocked when I first saw your code, till I realized you were substituting for « & ➝ !

These tri-graphs make it easier to transfer a program from the computer to the calculator.
However that might not be useful with the HP-28.