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- Newsgroups: bit.listserv.stat-l
- Path: sparky!uunet!utcsri!torn!news.ccs.queensu.ca!mast.queensu.ca!dmurdoch
- From: dmurdoch@mast.queensu.ca (Duncan Murdoch)
- Subject: Re: calculators and computers: precision
- Message-ID: <dmurdoch.378.726333098@mast.queensu.ca>
- Lines: 17
- Sender: news@knot.ccs.queensu.ca (Netnews control)
- Organization: Queen's University
- References: <STAT-L%93010605170684@VM1.MCGILL.CA>
- Date: Wed, 6 Jan 1993 15:11:38 GMT
-
- In article <STAT-L%93010605170684@VM1.MCGILL.CA> Ronan M Conroy <RCONROY@IRLEARN.UCD.IE> writes:
- >Phil Miller mentioned 69! as the
- >biggest factorial that the PC will handle. This, by less than
- >a coincidence, is the limit of what my Sharp EL-506H and my Tandy
- >(submerged on the desk, no doubt, at the moment) will handle.
- >69!/68! is correctly evaluated by them both as being 69.
-
- In fact "the biggest factorial a PC will handle" is not a well-defined
- number. PC's don't have a single floating point representation; each
- representation has different limits. If you have a numeric coprocessor, the
- single, double and temp real types (4, 8 and 10 bytes resp.) are supported
- by hardware; they can calculate factorials up to 34!, 170!, and 1754!.
- However, there are lots of packages providing arithmetic up to much higher
- limits in software.
-
- Duncan Murdoch
- dmurdoch@mast.queensu.ca
-