# Prime Numbers

## What is a prime number?

Any integer that is greater than one is called a prime number if its only positive divisors (factors) are one and itself. For an example the first six prime numbers are 2, 3, 5, 7, 11, and 13.

## Why calculate prime numbers?

The main reason people find these is for the fame! Many mathematicians think it would be great to discover a large prime number. You can also be rewarded for finding a prime number. www.eff.org posted this offer: \$50,000 to the first individual or group who discovers a prime number with at least 1,000,000 decimal digits (awarded Apr. 6, 2000) \$100,000 to the first individual or group who discovers a prime number with at least 10,000,000 decimal digits (awarded Oct. 22, 2009) \$150,000 to the first individual or group who discovers a prime number with at least 100,000,000 decimal digits \$250,000 to the first individual or group who discovers a prime number with at least 1,000,000,000 decimal digits Now what are you waiting for go find those primes!!