Twin Prime Search

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Twin Prime Search (TPS) is a distributed computing project that looks for large twin primes. It uses the programs LLR (for primality testing) and NewPGen (for sieving). It was founded on April 13th, 2006 by Michael Kwok, and its website is run by Andrea Pacini.

TPS has found one twin prime, 2003663613 × 2¹⁹⁵⁰⁰⁰ ± 1, on January 15, 2007, on a computer operated by Eric Vautier. It is 58,711 digits long, which makes it the largest known twin as of March 2007. The project works in collaboration with PrimeGrid, which does most of the LLR tests.

TPS is currently searching for a twin that is over a hundred thousand digits long.