Here are some source code and data calculations associated to my paper A test for identifying Fourier coefficients of automorphic forms and application to Kloosterman sums, appearing in Experimental Mathematics.

Kloosterman sums, S(1,1;p)/sqrt(p) stored in little-endian IEEE double precision format. (approx. 20 MB)

klsum.c and util.nasm Source code to compute Kloosterman sums (requires NASM).

check.c Source code to compute S_Y.