Note: Due to changes in the Riesel prime template, most of those pages (and related) are not shown properly.This will take some time!Wanna help? Please move any Riesel prime page first, then edit/add the base parameter.
 Topics Register • News • History • How to • Sequences statistics • Template prototypes

# Paul Leyland

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 $\displaystyle{ x^y + y^x }$, which are now called Leyland numbers.