-Computer Programming



-About Me


Is this number prime?

     This is my math/science page. I'm still kind of looking for stuff to put here. Note that some stuff isn't up yet since this is under construction, and some of these files are too big to upload well from home. Currently there are links to:

  • My divisibility rules still need work, and are nearly useless if you have a calculator, but still maybe interesting.
    The USAMTS contest 2nd round is over, so I can post them now. I'll get around to putting up a second, different, maybe easier set of directions up. I have to write it first. Here's the incomplete version: Divisibility Rules 2
  • Here's the link to my long lists of primes, found with the prime finder (v2) in Programming. I have reached my goal of posting the first 1 million prime numbers. I have no particular reason for doing this, but why not?
  • Create your own list of primes with this JavaScript tool (maybe I should put this in programming? Nah...)
  • With my perfect number finder, I have verified that there are four perfect numbers under 100000. They are 6, 28, 496, and 8128. If anyone has enough spare time to use the perfect number finder to check more numbers, write me. This may become my next project, now that the primes are done. NEW- I actually saw an interesting article the other day which inspired a probable upcoming major change to this section.
  • Here's justification for my Pi finder program.
  • A few math lab reports that I've done.
    • Lab 1: Population Growth is my 1999 projection of the 2000 population of the state of Massachusetts (based on the census every 10 years). I projected a population of 6,253,000 (with a simple logistical-growth model, nothing special). The U.S. Census Bureau projected it at 6,199,000, I think. The actual 2000 Census number was 6,349,097. (Check it at if you want.) So the prediction wasn't terrible, but wasn't good either.
      • Lab 1: Data is the data necessary to understand that lab.
    • Lab 2: Bifurcations in Linear Systems is another "lab."
    • Lab 3: Predator/Prey is a study of one system of predator-prey equations. Oh boy.
  • Here's a proof of Euler's equation: e^(i*pi) - 1 = 0.

In any case, I'm accepting suggestions.

Want to get in touch with me? My email is
Carl Staab, © 2001

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