Wolfram Language Number Theory utility functions.
To install this paclet in your Wolfram Language environment, evaluate this code:
PacletInstall["AntonAntonov/NumberTheoryUtilities"]
To load the code after installation, evaluate this code:
Needs["AntonAntonov`NumberTheoryUtilities`"]
s = SpiralLattice[11, "top-right"];
s2 = s /. {x_?PrimeQ :> Style[x, Red, Bold]};
Grid[s2]