Mathematician:John Lewis Selfridge

Mathematician
American mathematician who contributed to the fields of analytic number theory, computational number theory and combinatorics.

Proved in $1962$ that $78 \ 557$ is a Sierpiński number of the second kind.

Conjectured (with ) that it is also the smallest. This still has not been proven (see Sierpiński Problem).

Nationality
American

History

 * Born: February 17, 1927, Ketchikan, Alaska, United States
 * Died: October 31, 2010, DeKalb, Illinois

Theorems and Definitions

 * Baillie-PSW Primality Test (with, and )
 * Erdős-Selfridge Function (with )

Publications



 * 1974: A New Function Associated with the prime factors of $\displaystyle \binom n k$ (with and )










 * 1993: Estimates of the Least Prime Factor of a Binomial Coefficient (with and )