Confused about expressions in Prime RPN stack

[pinkman]

(05-03-2020 06:50 PM)Orome Wrote:  

(05-03-2020 06:48 PM)pinkman Wrote:  Like the others I think you’ll have to force yourself to think Prime, not 48.

I think you didn't read the question.

Be sure I did. But maybe I did not understand it!

[edit]
I might have been blinded by these words from you: “ I'd have expected something like the 48”