Paul Leyland
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Template:Short description Template:For Template:Use dmy dates Paul Leyland is a British astronomer and number theorist who has studied integer factorization and primality testing.
He has contributed to the factorization of RSA-129, RSA-140, and RSA-155, as well as potential factorial primes as large as 400! + 1. He has also studied Cunningham numbers, Cullen numbers, Woodall numbers, etc., and numbers of the form , which are now called Leyland numbers.[1] He was involved with the NFSNet project to use distributed computing on the Internet from 2005 to 2008.[2]