If you meant, how do you find
   1|3%:^~998x

I don't have a better answer for you. You'd probably have to implement
something like a newton-raphson root finder, I guess.

Thanks,

-- 
Raul

On Sat, Mar 20, 2021 at 11:01 PM Raul Miller <rauldmil...@gmail.com> wrote:
>
>    1++/0=3 | n
> 334
>
> p is a perfect cube if n is 1 or if n is a multiple of 3.
>
> (1 is the only whole power of 3 which is not a multiple of 3.)
>
> FYI,
>
> --
> Raul
>
> On Sat, Mar 20, 2021 at 10:58 PM Skip Cave <s...@caveconsulting.com> wrote:
> >
> > How do you solve this problem using J (brute force)
> > n =. >: i. 1000
> > p =. n^n
> > How many p are perfect cubes?
> >
> > Skip Cave
> > Cave Consulting LLC
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
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