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Groups > comp.lang.forth > #26948

Re: LC53, a respectable random generator?

From Bernd Paysan <bernd.paysan@gmx.de>
Newsgroups comp.lang.forth
Subject Re: LC53, a respectable random generator?
Date 2013-11-25 19:51 +0100
Organization 1&1 Internet AG
Message-ID <l70681$ag4$1@online.de> (permalink)
References (1 earlier) <op.w61slwx45zc71u@localhost> <52920a77$0$615$e4fe514c@dreader34.news.xs4all.nl> <d5eb8f1b-1bcb-4bbb-a3ff-04f961193323@googlegroups.com> <l6u00q$6cl$1@online.de> <l6vgn6$8ee$1@newsserver.rrzn.uni-hannover.de>

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Matthias Koch wrote:

> Bernd Paysan:
>> the German Wikipedia has even (relatively good)
>> variants for 32 and 64 bits:
>> 
>> http://de.wikipedia.org/wiki/Xorshift
> 
> \ Xorshift Random Number Generator, 32 Bits
> 
> 314159265 variable seed
> 
> : random ( -- x )
>   seed @
>   dup 13 lshift xor
>   dup 17 rshift xor
>   dup  5 lshift xor
>   dup seed !
> ;

If you want one that passes Diehard, take the 128 bit version.  The period 
of the 32 bit version is way too short to fool that test.

-- 
Bernd Paysan
"If you want it done right, you have to do it yourself"
http://bernd-paysan.de/

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Thread

LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-23 16:25 +0000
  Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-23 17:34 -0800
    Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-23 19:03 -0800
    Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-24 04:58 +0000
  Re: LC53, a respectable random generator? "Rod Pemberton" <dont_use_email@xnohavenotit.cnm> - 2013-11-24 04:57 -0500
    Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-24 14:17 +0000
      Re: LC53, a respectable random generator? mhx@iae.nl - 2013-11-24 08:12 -0800
        Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-24 16:46 +0000
        Re: LC53, a respectable random generator? Bernd Paysan <bernd.paysan@gmx.de> - 2013-11-24 23:53 +0100
          Re: LC53, a respectable random generator? mhx@iae.nl - 2013-11-24 15:41 -0800
            Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-24 17:57 -0800
            Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-25 19:32 +0000
              Re: LC53, a respectable random generator? mhx@iae.nl - 2013-11-25 14:22 -0800
              Re: LC53, a respectable random generator? Bernd Paysan <bernd.paysan@gmx.de> - 2013-11-26 00:20 +0100
                Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-26 03:29 +0000
                Re: LC53, a respectable random generator? thomas.bartscher@gmail.com - 2013-11-25 23:08 -0800
                Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-26 05:06 -0800
                Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-26 14:03 +0000
                Re: LC53, a respectable random generator? Bernd Paysan <bernd.paysan@gmx.de> - 2013-11-26 21:59 +0100
                Re: LC53, a respectable random generator? thomas.bartscher@gmail.com - 2013-11-28 01:32 -0800
                Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-25 19:43 -0800
              Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-25 19:31 -0800
              Re: LC53, a respectable random generator? "Elizabeth D. Rather" <erather@forth.com> - 2013-11-25 19:24 -1000
                Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-26 05:17 -0800
                Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-26 14:21 +0000
                Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-28 18:49 -0800
            Re: LC53, a respectable random generator? mhx@iae.nl - 2013-11-25 13:52 -0800
          Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-24 18:03 -0800
          Re: LC53, a respectable random generator? Matthias Koch <matthias.koch@hot.uni-hannover.de> - 2013-11-25 13:41 +0100
            Re: LC53, a respectable random generator? mhx@iae.nl - 2013-11-25 10:23 -0800
              Re: LC53, a respectable random generator? Howerd <howerdo@yahoo.co.uk> - 2013-11-25 13:43 -0800
                Re: LC53, a respectable random generator? mhx@iae.nl - 2013-11-25 15:16 -0800
                Re: LC53, a respectable random generator? Howerd <howerdo@yahoo.co.uk> - 2013-11-26 13:38 -0800
                Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-26 20:42 -0800
                Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-27 11:46 +0000
                Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-27 18:35 -0800
                Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-26 21:41 -0800
                Re: LC53, a respectable random generator? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-11-27 03:21 -0600
                Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-27 15:37 +0000
                Re: LC53, a respectable random generator? Bernd Paysan <bernd.paysan@gmx.de> - 2013-11-27 23:01 +0100
                Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-27 23:39 +0000
                Re: LC53, a respectable random generator? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-11-28 05:41 -0600
                Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-28 13:47 +0000
                Re: LC53, a respectable random generator? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-11-28 09:10 -0600
                Re: LC53, a respectable random generator? Bernd Paysan <bernd.paysan@gmx.de> - 2013-11-28 16:22 +0100
                Re: LC53, a respectable random generator? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-11-28 09:34 -0600
                Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-28 18:39 -0800
                Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-27 16:44 +0000
            Re: LC53, a respectable random generator? Bernd Paysan <bernd.paysan@gmx.de> - 2013-11-25 19:51 +0100
      Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-24 11:13 -0800
        Re: LC53, a respectable random generator? Hans Bezemer <the.beez.speaks@gmail.com> - 2013-11-25 09:52 +0100
  Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-24 13:07 -0800
    Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-25 02:18 +0000
      Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-24 19:36 -0800
  Re: LC53, a respectable random generator? "Ed" <invalid@invalid.com> - 2013-11-26 12:57 +1100
    Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-26 21:25 -0800
    Re: LC53, a respectable random generator? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-11-27 15:48 +0000
  Re: LC53, a respectable random generator? Mark Wills <markrobertwills@yahoo.co.uk> - 2013-11-27 01:10 -0800
    Re: LC53, a respectable random generator? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-11-27 03:29 -0600
      Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-27 19:49 -0800
        Re: LC53, a respectable random generator? Bernd Paysan <bernd.paysan@gmx.de> - 2013-11-28 15:57 +0100
          Re: LC53, a respectable random generator? hughaguilar96@yahoo.com - 2013-11-28 18:14 -0800

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