From this set of digits {1,1,2,4,7,9,9,9,9} allot one digit to each cell of a 3 x 3 array so that each column and major diagonal (read top-down) and row (read left-to-right) is a 3-digit prime number, resulting in 8 primes in all.

Then repeat the process using this set: {1,1,1,3,4,6,9,9,9}.