Chris Caldwell is a professor of mathematics at the University of Tennesse at Martin. He has long been interested in primes. He earned his B.S. in Mathematics at California State University, Hayward in 1979 (the same time Landon Curt Noll and Laura A. Nickel were there and finding M25 and M26). He received his Ph.D. from UC Berkeley, where Dr. Lehmer taught.
Dr. Caldwell maintains the The Prime Pages.