Prime Sudoku

Select a cell to highlight it, then enter a value from 1 to 9. Fill the entire 9x9 puzzle so that each line, vertical line, and 3x3 box contains every number exactly once. Employ logic to determine where each value must be placed. Do not allow repeating a number in the same line, column, or 3x3 block. Begin with an gentle difficulty to understand the rules. Take your time and think logically to solve the puzzle.