EagleSun wrote:
> Can anyone give me clues?

The problem is basically in how computers handle numbers.  They can't 
easily do very small and very large (or normal and extremely large) 
numbers at the same time.  This isn't to say that they can't do that at 
all, but because it isn't common it isn't handled by modern algorithyms, 
and even if it were it would be significantly slower than other methods.

Computer speed is all about taking shortcuts with math; not using 
forward raytracing except in limited ways relating to specific instances 
in POV, or using heavy optimizations to make games run at usable 
framerates...or using two digits to store the year because it takes up 
half the memory...XD

-- 
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean

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