Erdös number:
My Erdös number is 4: Malaya --> Carey --> Joubert --> Faber --> Erdös

1. Malaya, Nicholas, Kemelli C. Estacio-Hiroms, Roy H. Stogner, Karl W. Schulz, Paul T. Bauman, and Graham F. Carey. MASA: a library for verification using manufactured and analytical solutions. Engineering with Computers 29, no. 4 (2013): 487-496.
2. Lorber, Alfred A.; Carey, Graham F.; Joubert, Wayne D. ODE recursions and iterative solvers for linear equations. Special issue on iterative methods in numerical linear algebra (Breckenridge, CO, 1994). SIAM J. Sci. Comput. 17 (1996), no. 1, 65-77.
3. Faber, V.; Joubert, W.; Knill, E.; Manteuffel, T. Minimal residual method stronger than polynomial preconditioning. SIAM J. Matrix Anal. Appl. 17 (1996), no. 4, 707-729.
4. Erdös, Paul; Faber, Vance; Larson, Jean Sets of natural numbers of positive density and cylindric set algebras of dimension 2. Algebra Universalis 12 (1981), no. 1, 81-92.

Source: American Mathematical Society MathSciNet.