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RE: [Gcl-devel] RE: [Maxima] modulus

From: Stavros Macrakis
Subject: RE: [Gcl-devel] RE: [Maxima] modulus
Date: Tue, 2 Dec 2003 12:19:51 -0500

> > In a fresh GCL 2.5.0, (expt 234 234234) immediately crashes with an 
> > illegal instruction (0xc000001d) at location 0x0053f611.

> 1) Please try with latest gcl for windows, at
> http://www.cs.utexas.edu/users/boyer/gcl

I tried, but file not found:

>    hangs for a very long time trying to calculate the answer.
>    I cannot tell if this is a problem, or whether the number is
>    effectively too large to be processed in a reasonable amount
>    of time.

Well, in Maxima (gcl 2.5.0) it returns in 1.2 secs (1Ghz Athlon), though
displaying it takes far longer than that.  The first 100 digits agree
with bfloat, (234.0b0^234234, fpprec:100) and the last 30 agree with
modular exponentiation (rat(234)^234234,modulus:10^34), and a couple of
other cross-checks also agree, so I'm convinced it is giving the correct


Maxima 5.9.0 gcl 2.5.0 W2k mingw32 Athlon 1Ghz

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