We can now move forward to the 5 shell. The same rules apply.
1. The Reveal shell is 5×3×2×1=30.
2. The next prime number is 7, so system works to 7^2=49.
When choosing the exclusion shells, you only require those that are wholly divisible into 30. Numbers less than the prime being plotted (3 & 2 in this case) don’t need to be included either. So for the 5 shell, the exclusion shells that make the reveal shell work are the 1, 5, 6, 10 & 15 shells.