RPL exercise - Last Digits of Primes (HP 49G, G+, 50g)

[grsbanks]

(06-01-2019 08:51 AM)Carsen Wrote:  ...test if the digit is a 1, 3, 7, 9, or none of the above

How could it be none of the above? It can't be 5 because the number would then be divisible by 5 and it can't be any of 0, 2, 4, 6, or 8 or the number is divisible by 2. It *has* to be one of those 4.

You can simply extract the last digit and not bother with the test.