mensanator at aol.com
Sun Feb 1 22:04:02 CET 2009
On Feb 1, 2:27 am, casevh <cas... at gmail.com> wrote:
> On Jan 31, 9:36 pm, "Tim Roberts" <t.robe... at cqu.edu.au> wrote:
> > Actually, all I'm interested in is whether the 100 digit numbers have an exact integral root, or not. At the moment, because of accuracy concerns, I'm doing something like
> > for root in powersp:
> > nroot = round(bignum**(1.0/root))
> > if bignum==long(nroot)**root:
> > .........
> > which is probably very inefficient, but I can't see anything better.....
> > Tim
> Take a look at gmpy and the is_power function. I think it will do
> exactly what you want.
And the root function will give you the root AND tell you whether
it was an integral root:
In this case, it wasn't.
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