A
Woodall number is defined to be a number of the form n\,2^n-1. If a
prime number can be written in this form, it is then called a Woodall prime. The generalized Woodall numbers and generalized Woodall primes substitute any base b\ge 2 for the base 2. Woodall first announced his work on factorization in a 1911 publication, acknowledging in it his communication on the subject with
Allan J. C. Cunningham. In 1925 Cunningham and Woodall gathered together all that was known about the primality and factorization of the Woodall numbers and the generalized Woodall numbers with base 10, and published a small book of tables. Since then many mathematicians have continued the work of filling in these tables. ==References==