Prime Number Sudoku (Fun With Sudoku #28)

Before the themed Sudoku and Puzzle test at Logic Masters India website, there used to be Sudoku and Puzzle Mock tests. There were around 21 Mock tests before LMI moved to themed Puzzle/Sudoku tests. This 'Prime Number Sudoku' puzzle I created for the 21st Indian Sudoku Mock Test.

I am re-publishing this Prime Number Sudoku as the 28th Sudoku in the Fun With Sudoku Series.

Rules of Prime Number Sudoku

Classic Sudoku Rules apply. Moreover greyed squares can only contain prime Numbers e.g. Greyed cells can contain only Primed Numbers (2, 3, 5, 7 only).