Grid - Partition - Identify Primes with Formatting

Starting with an example from Mangano, Mathematica Cookbook, and the Doc Center, here are examples of using Partition with Grid and formatting to highlight the values of interest.

Grid@Partition[If[PrimeQ@#,Framed[#,FrameStyle->Red],#]&/@Range@200,20]

Grid@Partition[If[PrimeQ@#,Style[#,FontColor->Red],#]&/@Range@200,20]

Grid@Partition[If[PrimeQ@#,Style[#,FontColor->Red,FontWeight->Bold],Style[#,FontColor->Gray]]&/@Range@200,20]

This sets up a clickable square from which you can interactively choose a color.

Clear@highlightColor;ColorSetter@Dynamic@highlightColor

Then the selected color is used here:

Grid@Partition[If[PrimeQ@#,Style[#,FontColor->highlightColor,FontSize->16,FontWeight->Bold],Style[#,FontColor->Gray]]&/@Range@200,20]

Grid@Partition[If[!PrimeQ@#,Style[#,FontColor->White],#]&/@Range@200,20]

Change the Partition from 20 to 10 to accommodate larger numbers.

Grid@Partition[If[!PrimeQ@#,Style[#,FontColor->White],#]&/@Range[500000,500200],10]