  Be d_{m,n} a generic element in the infinite matrix D, with d_{1, n} defined
as the n-th prime number and, for any m>1, d_{m, n} = | d_{m-1, n} - d_{m-1,
n+1} | When n>1, after the first few terms the columns in the matrix appear to
be constituted entirely by 0s and 2s. Here is reported a computation over about
4.55x10^8 elements of D, which suggests a pseudo-random distribution of these
two values.
