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000062_icon-group-sender_Wed Apr 11 09:11:24 2001.msg
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by baskerville.CS.Arizona.EDU (8.11.1/8.11.1) id f3BG9rE01772
for icon-group-addresses; Wed, 11 Apr 2001 09:09:53 -0700 (MST)
Message-Id: <200104111609.f3BG9rE01772@baskerville.CS.Arizona.EDU>
Date: 11 Apr 2001 11:42:37 BST
From: rjhare@ed.ac.uk
Subject: Cyclic numbers
To: icon-group@cs.arizona.edu
Organisation: Edinburgh Parallel Computing Centre
Errors-To: icon-group-errors@cs.arizona.edu
Status: RO
Content-Length: 606
I just received a message from a colleague:
> 142857 is a cyclic number, the numbers of which always appear in the
> same order but rotated around when multipled by any number from 1 to 6.
>
> 142857 * 2 = 285714
> 142857 * 3 = 428571
> 142857 * 4 = 571428
> 142857 * 5 = 714285
> 142857 * 6 = 857142
>
> So can you find any more numbers like this? Is there a simple algorithm
> for finding them or is this another good application for parallel
> machines?
I don't remember seeing this one in the Icon mailing list before - anyone
got any ideas?
Roger Hare
Edinburgh Parallel Computing Centre