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MathGroup Archive 2007

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Re: What is $MaxNumber on a 64 bit Computer?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg80959] Re: What is $MaxNumber on a 64 bit Computer?
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Thu, 6 Sep 2007 05:30:31 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, UK
  • References: <200709040736.DAA23026@smc.vnet.net> <fblk52$qjq$1@smc.vnet.net>

Ingolf Dahl wrote:

<snip>

> By the way, I note that Exp[Log[$MaxNumber]] generates Overflow, but
> Exp[Log[$MaxNumber/2]] is OK on my computer. I use that in a program, so I
> wonder if there is any other system where the last expression generates
> Overflow.

FWIW, got overflow for the first expression. Second expression is okay 
on my PC, 32 bits, architecture x86, Intel Pentium 4 processor with HT 
(Hyper-Threading) technology and Microsoft Windows XP SP2 (Service Pack 
2), Mathematica for Windows versions 6.0.1.

In[1]:= $Version
Exp[Log[$MaxNumber]]
Exp[Log[$MaxNumber/2]]

Out[1]= "6.0 for Microsoft Windows (32-bit) (June 19, 2007)"

During evaluation of In[1]:= General::ovfl: Overflow occurred in \
computation. >>

Out[2]= Overflow[]

Out[3]= 9.601123363461783992717910966`15.954589770191003*^646456886

Best regards,
-- 
Jean-Marc


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