On Wed, 13 Jan 2010 10:04:48 +0000, Invisible wrote:

>>> 2^64 = 1.844 * 10^19.
>> 
>> Start looking at tetration if you want big numbers. :-)
> 
> Constructing huge numbers is easy. I'm looking at big numbers that have
> some sort of real-world significance.

Then look at Graham's number, though whether it has real-world 
significance or not depends highly upon the field someone's in.  :-)

Jim

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