My Erdös number is 3 (T. Raiko - H. Mannila - B. Bollobás - P. Erdös)

T. Raiko, K. Puolamäki, J. Karhunen, J. Hollmén, A. Honkela, S. Kaski, H. Mannila, E. Oja, and O. Simula.
Macadamia: Master's Programme in Machine Learning and Data Mining.
Proc. of Teaching Machine Learning: Workshop on open problems and new directions, Saint-Etienne, France, May 6-8, 2008.

Béla Bollobás, Gautam Das, Dimitrios Gunopulos, and Heikki Mannila.
Time-series similarity problems and well-separated geometric sets.
In Proceedings of the thirteenth annual symposium on Computational geometry (SCG '97). ACM, New York, NY, USA, pages 454-456, 1997.

Béla Bollobás and Paul Erdös.
Cliques in random graphs.
Math. Proc. Cambridge Philos. Soc 80.3 (1976): 419-427.