27704267971
This number is a prime.
2 7704267971
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The largest prime factor of the number of valid Sudoku solution grids for the standard 9x9 grid. It was first calculated by Bertram Felgenhauer in 2005.
Submitted: 2007-09-20 02:17:25; Last Modified: 2016-09-02 00:26:22.
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