Okay, it’s a joke among scientists – but it is nice to know that one has a finite Erdős number. 
For everyone who does not know what I am talking about: Wolfram MathWorld describes the Erdős Number as…
…the number of “hops” needed to connect the author of a paper with the prolific late mathematician Paul Erdős. An author’s Erdős number is 1 if he has co-authored a paper with Erdős, 2 if he has co-authored a paper with someone who has co-authored a paper with Erdős, etc. (Hoffman, P. The Man Who Loved Only Numbers: The Story of Paul Erdős and the Search for Mathematical Truth. New York: Hyperion, 1998. Hoffman 1998, p. 13)
Using the Collaboration Distance Calculator from MathSciNet, I was able to determine mine: 5
Update: I was told that my Erdős number is actually 4! 
Collaboration path:
- Kai C. Bader and Christian Grothoff and Harald Meier, “Comprehensive and relaxed search for oligonucleotide signatures in hierarchically clustered sequence datasets”, Bioinformatics, 27, 11:1546-54, 2011.
- Christian Grothoff and Krista Grothoff and Ryan Stutsman and Ludmila Alkhutova and Mikhail J. Atallah, “Translation-based steganography”, Journal of Computer Security, Volume 17, Issue 3, pages 269-303, 2009.
- Mikhail J. Atallah and Samuel S. Wagstaff, “Watermarking Data Using Quadratic Residues”, Proc. of SPIE Workshop on Electronic Imaging (SPIE 99), SPIE – The International Society for Optical Engineering, SPIE Vol. 3657, pages 283-288, 1999.
- Paul Erdos and Samuel S. Wagstaff, “The Fractional Parts of the Bernoulli Numbers”, Illinois J. Math. 24, pages 104-112, 1980.