oh!  very cool.  Thanks!  I knew about toom-cook, and based on what I do I figured it could be faster by breaking up into &#x27;bigger power of 2 digits&#x27;.  Now I know for sure (without having to implement it myself).<p>Realistically though, you&#x27;re not gonna implement a FFT mult on a 64-bit integer&#x2F;float even.<p>Pedantry is not annoying if it&#x27;s a learning opportunity (or if it&#x27;s excellently funny), IMO.