PrimeGrid
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PrimeGrid is a distributed computing project for searching for prime numbers of world-record size. It makes use of the Berkeley Open Infrastructure for Network Computing (BOINC) platform.
Primegrid worked with the Twin Prime Search to find record-size twin primes that are approximately 58,700 digits long. The project ended when a new twin of that size was discovered on January 15, 2007 (sieved by Twin Prime Search and tested by PrimeGrid). A project to search for twin primes that are just above 100,000 digits long is in progress.
As of January 4, 2008, the project has discovered the three largest Woodall primes known to date.[1] The largest of these, 3752948*23752948-1, is the first mega prime discovered that is also a Woodall prime and is 1,129,757 digits long. It was discovered on December 21, 2007 by Matthew Thompson using the LLR program.[2] The search for an even bigger Woodall prime continues.
PrimeGrid is also running a search for Cullen prime numbers, helping 3*2^n-1 Search project search for primes, and sieving for Prime Sierpinski Project.
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