My Erdös number is 3. I co-authored a paper with David Pokrass Jacobs in 1993:
D. P. Jacobs, Jeff Offutt, and S. V. Muddana. "A Computer Algebra System for Nonassociative Identities. Hadronic Mechanics and Nonpotential Interactions," Proceedings of the Fifth International Conference, pages 185-195, Cedar Falls, Iowa, Myung, H.C. (Ed.), Nova Science Publishers, Inc., New York 1993.
Dave is listed on the official Erdos site with an Erdös number of 2.