Sudoku Numbers

Written by Super User. Posted in Sudoku

Some numbers regarding classical Sudoku (9x9 grid):

81: number of cells in a Sudoku grid.

17: the minimum number of givens in order to have a uniquely completable grid.

49151: the number of different grids with 17 givens actually known.

6,670,903,752,021,072,936,960: ~6.67×1021, number of possible ways of filling in a Sudoku grid.

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