How do people find big primes? These primes have millions of digits, and may take years of collective effort and computing power to be found. Unsurprisingly, mathematicians have figured out various ways to more efficiently and accurately find these big primes. In the process, the unique and interesting properties of various primes have also been found. Great Internet Mersenne Prime Search: PrimeGrid Other resources PrimePages - collection of all the largest primes : Primality Proving - the math behind prime proofs: Wolfram MathWorld article on Mersenne primes: Images : ? Music No but Yes by C418 Blank Cubical by C418 Match Cut by C418 Work Life Imbalance by C418