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MathGroup Archive 2006

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Re: Writing prime factor decomposision in conventional form

  • To: mathgroup at smc.vnet.net
  • Subject: [mg65346] Re: Writing prime factor decomposision in conventional form
  • From: mike_in_england2006 at yahoo.co.uk
  • Date: Mon, 27 Mar 2006 06:56:22 -0500 (EST)
  • References: <e05ri1$3ru$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hello Wolfgang

I found the folllowing code at
http://mathworld.wolfram.com/PrimeFactorization.html

SetAttributes[FactorForm, Listable];

FactorForm[n_?NumberQ, opts___] := Times @@ (HoldForm[Power[##]] & @@@
\
FactorInteger[n, opts])

Seems to do what you want.
Regards,
Mike


Dr. Wolfgang Hintze wrote:

> How can I get a conventional form output for the prime number
> decomposition, e.g. {{2,3},{5,1}} as 2^3 5 ?
>
> I have found some (rather cumbersome) method but it leaves the final
> expression in "" when I put it into input format in order to transfer it
> in simple text form to another application.
>
> I'm sure that there is a simple way to achieve the goal.
> 
> Any idea is greatly appreciated.
> 
> Regards,
> Wolfgang


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