Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Math Topics » alt.math.recreational.independent

Topic: Unexplained, confirmed reoccurring pattern in primes. Explanations?
Replies: 6   Last Post: May 24, 2012 7:03 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ] Topics: [ Previous | Next ]
Daniel Saarimäki

Posts: 5
Registered: 5/18/12
Re: Unexplained, confirmed reoccurring pattern in primes. Explanations?
Posted: May 24, 2012 7:03 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Here is another interesting finding.

I have already found out that, if you mark remainder with %, the sum of x%a-(x-1)%a while 1<a<x subtracted with x-2 gives always 0 when x is a prime and negative number if it's not. I graphed it with an open source software called Graph. Then I multiplied it with -1 to get positive results and then divided the whole bunch with x/42 rounded up to the next integer.

The resulting graph was interesting, as the highest result I found was somewhere at 110 whereas most of the results seemed to go below f(x)=42. I wasn't able to find a clear cycle from this one either but there seems to be some regularity in it.

I include a screenshot and a graph file with this message. You can open the graph file only with Graph (beta only). Software can be downloaded from http://www.padowan.dk/graph/Beta.php



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2013. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.