Difference between revisions of "2006 SMT/General Problems/Problem 12"
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Revision as of 18:01, 14 January 2020
Noticing that the sum of the digits of 8091 is 18, we can divide 8091 by 9, yielding 899. Testing all prime numbers up to , we see that 899 is divisible by 29.
Therefore, the largest prime divisor of 8091 is