The Home Page of John Moyer

Prime Numbers and Other Interesting Things

• Print all of the primes within a range of integers. These are from a file containing all of the primes less than 8000000000.
• Source code for a sieve program: sieve2310.c or embedded in html for easy viewing with Internet Explorer sieve2310.c.html or to ftp sieve2310.c or to ftp a 32bit ".EXE" file and source for Microsoft Windows sieve2310.exe at ftp.rsok.com. If you have never before run a Windows command line program, then try something similar to:
  Start->Run->cmd.exe
  C:> sieve2310.exe -s 1 -e 1000 > primes.txt
  C:> start primes.txt
• factor.exe is a Windows NT commmand line program to print the prime factors of an integer. It may also work with Windows 98. Type "factor help" to get a usage message. It seems to work on integers up to about 9007199254740989. bfactor.exe is another Windows NT command line program to print the prime factors of an integer. It will attempt to factor integers up to about 600 digits, but most will take a very long time, maybe many years. If the Windows 98 command line is not long enough, bfactor will read one integer per line from stdin. 31610054640417607788145206291543662493274686990 is an easy integer for bfactor.exe to factor if you want to test it without waiting too long. There is also a Linux binary of bfactor. ftp.rsok.com
• Find the prime factors of an integer.
• The first 10000 digits of pi as an ASCII text file. More digital expansions of PI are at http://www.research.att.com/~njas/sequences/A000796.
• (Offsite) Some ways to calculate pi at http://www.cs.unb.ca/~alopez-o/math-faq/node38.html.

  /*
  The following 160 character C program, written by Dik T. Winter at CWI,
  computes pi to 800 decimal digits.
  */
  int a=10000,b,c=2800,d,e,f[2801],g;main(){for(;b-c;)f[b++]=a/5;
  for(;d=0,g=c*2;c-=14,printf("%.4d",e+d/a),e=d%a)for(b=c;d+=f[b]*a,
  f[b]=d%--g,d/=g--,--b;d*=b);}
  

• (Offsite) More about pi at http://www.nersc.gov/~dhbailey/ and http://www.lacim.uqam.ca/~plouffe/
• Look up an integer in my list of prime numbers to learn whether it is prime.
• Find the next prime number larger than an integer you provide. This is a JAVA program and requires a new enough JAVA in your web browser to include the java.math.BigInteger package. Source code is here.
  Find the next ten prime numbers after the integer you provide.
• This program which uses (with permission) a small amount of my code calculates various prime number statistics. http://ndirty.cute.fi/~karttu/matikka/Schemuli/primestats.c.txt. (offsite)
• John Moyer's old web page with chemical thermodynamic calculators, including diagrams of vapor/liquid equilibrium. I stopped maintaining this page several years ago.
• Source code for a Binary Coded Decimal library for x86 Linux or UNIX that I wrote a long time ago.
• (Offsite) Check web pages for valid html. Everyone who publishes a web page should validate it.
• (Offsite) Learn about standard html.
• OU wins national football championship. Some of my photographs of the championship game and a few from other seasons.
• Refraction of C band satellite signals.
• mkthumbindex.sh: I wrote a shell script that creates a html (web page) index of a directory full of jpeg images. Requires ImageMagick.org and bash or ksh to run. The output is similar to the photos of Ireland web pages referred to by the next two links. This script uses html 4.01 and Cascading Style Sheets. Thumbnail images are created by the convert program that is part of ImageMagick. In the resulting web page, one may click on the thumbnail or on the file name to view the image. The script works fine under Unix or Linux, but may need to be changed to run under windows.
• Photos of Ireland from my trip there in January, 2004.
• Photos of Ireland from my trip there in July, 2005.
• Photos of Ireland from my trip there in 2007.
• A photo I took of a stream in the Ouachita National Forest, Oklahoma, USA.
• St. Columba and the druids. St.Columba was also called St. Columcille or Colum Cille or Colmcille. I wrote up a very brief history.
• These wild turkeys came to my house.
• My experience with a Budget Rental car in Ireland.
• (Offsite) The history of the "Moyer" name is at http://www.gameo.org/encyclopedia/contents/M694ME.html. Manasseh Moyer, mentioned on that page, was my great-grandfather.
• Edwin S. Moyer, son of Manasseh Moyer, wrote a family history in 1937.
• (Offsite) The history of the "Latschar" name is at http://www.gameo.org/encyclopedia/contents/l387me.html. Some of my ancestors were named Latschar. A brother of one of my Latschar ancestors bought land from the founder of the Amish.
• http://mathforum.org/library/view/41535.html
• http://www.aWeeBitOfIreland.com/ has some information about a megalithic portal tomb that I visited in 2005.
• (offsite) Olivia Swan used some of my code in a computer science project at her university.
• (offsite) For web design in Montana, contact Greg O'Donnell at http://www.yellowstonewebdesign.com/.
• (offsite) http://ams.confex.com/ams/pdfpapers/83578.pdf lists me in the credits.
• (offsite) http://www.okhighered.org/oasis/resources.shtml
• (offsite) http://www.bootsnall.com/articles/node/7113/print has a link to one of my photographs.
• (offsite) http://freepages.genealogy.rootsweb.com/~tyrone/photos/ireland/sligo-drumcliff.html has a link to one of my photographs.
• All of the 7 digit palindromic primes.
• All of the 9 digit palindromic primes.

Nican yotlan notlatol.

send email to John Moyer, jrm@rsok.com

Copyright 1999-2008, John Moyer