modular exponentiation?

[John Keith]

(06-28-2018 09:56 PM)Thomas Klemm Wrote:  You could probably just ditch the following:

Code:

IF DUP 0 <
THEN MODULO +
END

I have no HP 50g thus I can't verify my assumption.
But the final MODULO MOD should take care of possible negative values.

You're right, it returns the correct value in 93.4 seconds without the test clause.