10E500?

[Snorre]

(12-09-2014 08:21 PM)mpowell@rogershsa.com Wrote:  Hi. I tried it but got a syntax error.

Hi,
it didn't work because it was just a CAS-function, not a program.
A program might look like

Code:

EXPORT BIGFAC(n)
BEGIN
  LOCAL s:=0,k;
  FOR k FROM 2 TO n DO s:=s+LOG(k); END;
  ALOG(FP(s))+"ᴇ"+IP(s);
END;

Note: this is meant just as an example how to deal with big floats for a particular problem (faculty in this case). It returns a string which cannot be used for further calculations.
You may program a big float math library by representing them as [mantissa, exponent] vectors and (re)defining some basic operators (+, -, *, /, !, ...). But that may not work very well for operators where mantissas and exponents cannot treated separately.
On the other side: such big numbers occur mostly in combinatorial problems which often require not more than a few basic operators.