Path

My Erdös Number is (at most) 4. Thanks to Christoph and Daniel for pointing this out to me. Here's the path of length 4 (Erdös - Ivic - Hafner - Breuel - Cutter):

1. Erdös, Paul; Ivic, Aleksandar: Estimates for sums involving the largest prime factor of an integer and certain related additive functions. Studia Sci. Math. Hungar. 15 (1980), no. 1-3, 183--199.
2. Hafner, James Lee; Ivic, Aleksandar: On the mean-square of the Riemann zeta-function on the critical line. J. Number Theory 32 (1989), no. 2, 151--191.
3. Niblack, Wayne; Zhu, Xiaoming; Hafner, James L.; Breuel, Tom; Ponceleon, Dulce B.; Petkovic, Dragutin; Flickner, Myron D.; Upfal, Eli; Nin, Sigfredo I.; Sull, Sanghoon; Dom, Byron E.; Yeo, Boon-Lock; Srinivasan, Savitha; Zivkovic, Dan; Penner, Mike: Updates to the QBIC system. Proc. SPIE Vol. 3312, p. 150-161, Storage and Retrieval for Image and Video Databases VI, 1997.
4. Michael P. Cutter, Joost van Beusekom, Faisal Shafait, Thomas M. Breuel, “Unsupervised Font Reconstruction Based on Token Co-Occurrence,” in 10th ACM Symposium on Document Engineering, 2010.