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# Monthly Archives: September 2006

## New bookshelf entry: The Book of Numbers

After seeing John H. Conway and Richard Guy‘s The Book of Numbers cited in yet another interesting article/book/whatever, I finally decided that I clearly had to read it. (It seems to get cited a lot in certain circles.) I wasn’t … Continue reading

Posted in books, famous numbers, geometry, golden ratio, infinity, links, primes
3 Comments

## Proof by animation

A proof of the Pythagorean Theorem: [java_applet] Cool, huh? If you don’t immediately see how it’s a proof of the Pythagorean Theorem… just stare at it for a while. =) You can pause the animation (and then restart it again) … Continue reading

Posted in geometry, proof
2 Comments

## New Mersenne prime, for real this time!

GIMPS has just announced today that they have indeed found a new Mersenne prime! Obviously I can’t print the whole thing here, but I can tell you that the first 50 digits are 12457502601536945540085550157479950312279598515115, and the last 50 digits are … Continue reading

## Challenge #5 Solution

Okay, time for a solution to Challenge #5…

Posted in famous numbers, golden ratio, solutions

## New Mersenne prime (probably)!

The Great Internet Mersenne Prime Search has just announced that they have (probably) discovered a new Mersenne prime. They haven’t released any details yet so speculation abounds. Will this be the prime to win the $100,000 prize awarded by the … Continue reading