17
This number is a prime.
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It has been proven (January 2012) by Gary McGuire and his collaborators of University College Dublin that 17 is the fewest number of clues that can be provided in a Sudoku puzzle that will lead to a unique solution. [Green]
Submitted: 2012-04-27 00:24:08; Last Modified: 2012-04-27 00:49:05.
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