using excel VBA find and higlight in red all prime numbers in a table of numbers

[TeraFumba]

using excel VBA i have to generate a table of numbers counting anti clock wise with one in the middle and highlight prime numbers in red in the processs.

At the moment i have came up with code to generate the table of numbers anti clockwise , my problem now is to highlight red all prime numbers .

here is my code :

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The out pout should be similar to the following image :
image.png

[YasserKhalil]

Hello Try this

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[karedog]

Another one :

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