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2021-09-07, 02:34   #1
MattcAnderson

"Matthew Anderson"
Dec 2010
Oregon, USA

3×11×29 Posts
prime constellations web page

Unfortunately, I am no longer able to edit the online file, and I don't know how long it will
be before it is wiped off the internet.

There are many hours of original prime constellation calculations in this project.

Also, other people have done calculations, and the results are shared at The Online Encyclopedia of
Integer Sequences.org.

Have a look.

Matthew C. Anderson
Attached Files
 Search for Prime Constellations.pdf (215.5 KB, 51 views)

2021-09-07, 03:02   #2
chalsall
If I May

"Chris Halsall"
Sep 2002

2·5,023 Posts

Quote:
 Originally Posted by MattcAnderson Have a look.
On every whiteboard I encounter I write $\sqrt{-1}^2=?$ in the upper right-hand corner.

Very few find it funny. Which is exactly the point.

 2021-10-18, 18:38 #3 MattcAnderson     "Matthew Anderson" Dec 2010 Oregon, USA 3·11·29 Posts Hi all, I found a webpage with a nice definition of Prime constellations. Especially I like that they specified no repetitions and some prime numbers can be skipped if it is a prime cluster. Prime constellations are prime clusters with certain restrictions. https://oeis.org/wiki/Prime_constellations Regards, Matt
 2021-10-18, 20:46 #4 kuratkull     Mar 2007 Estonia 149 Posts Looks like a fun way to get into primes - it's something that would have aroused my interest a decade ago. But am I overlooking something? All these(the ones in the PDF) would take up to a second to find. Last fiddled with by kuratkull on 2021-10-18 at 20:46 Reason: pdf
2021-10-19, 02:33   #5
MattcAnderson

"Matthew Anderson"
Dec 2010
Oregon, USA

3·11·29 Posts

Quote:
 Originally Posted by kuratkull Looks like a fun way to get into primes - it's something that would have aroused my interest a decade ago. But am I overlooking something? All these(the ones in the PDF) would take up to a second to find.
Hi all, Thank you for your interest Kuratkull.

Most of the prime lists I found were at least an overnight calculation.

I used the isprime() function in Maple and it is quite slow. But easy to use. I only learned 3 computer languages - Pascal, Maple, and HTML. I spent over two months of computer calculation back in 2006 to come up with some original calculations of shortest prime constellations. Lets look at the 9-tuples - in the OEIS.org/A022546. These are linked from "Search for Prime Constellations.pdf" file in this thread.

I did 200 prime number entries in the sequence. Then Dana Jacobsen did 800 more, taking the list to 1,000.

Now Normah Luhn has taken the lists even further and is actively working on it in 2021.
see http://www.pzktupel.de/ktuplets.htm
check line 27. List of the smallest prime k-tuplets.

Cheers
Matt

Last fiddled with by MattcAnderson on 2021-10-19 at 02:34 Reason: mispelled name

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