Frits offered two ways to code:

1) THE MATRIX

The space means the prime product THE has to be added to the prime product MATRIX from the subsequent group of 22 primes.

This has the disadvantage that if you take a product of primes out of a group of 22 subsequent primes, after that you are not able to use the primes from that specific group again.

2) THE3MATRIX21PART5TWO

The first group of 22 primes is:

1 A, 2 B, 3 D, 5 E, 7 F, 11 G, 13 H, 17 I, 19 J, 23 K, 29 L, 31 M, 37 N, 41 O, 43 P, 47 R, 53 S, 59 T, 61 U, 67 W, 71 Y, 73 Z

Regard 1999 = 5*17*23 + 43 + 1.

43, 23, 17, 5 and 1 are all taken from the first group.

So P KIE A (code system 1) will not do but P-1KIE-1A would. The -1 means that when you have taken prime P from the 1rst group of 22 primes, and want go to the group of 22 primes from which you take the prime product KIE, then first skip -1 groups. This is to understand as go one step back before you do one step forward to the next group which makes you to end up in the same group. So 5*17*23 + 43 + 1 can be denoted in this code system.

In the prime product 71 * 73 * 193 * 197, the code can be YZ2AB, YZ from the 1rd group and AB from the 3rd group of 22 primes.

The 2 is the command to skip 2 groups but it is also the command to add AB to YZ which is not meant here. So I guess these two commands in one number have to be split in separate commands.

The system seem to work.

Another way to denote 1999 is 13T because 1999 itself is a prime number. Frits didn't look that up.