How many different Sudoku puzzles ?
In 2005, two researchers proved that the number of grids was exactly of 6 670 903 752 021 072 936 960 grilles This result was proven with an exhaustive research and was validated thereafter by other researchers. By holding account of symmetries, the number of grid strongly falls and there remain only 5 472 730 538 grids of Sudoku. While spending 10 minutes by grid, at a rate of 8 hours per day, it would be necessary for you more than 3 million years to come from there to end…
