1330
This number is a composite.
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1330 is the only number m less than 7777777 such that |m - 3^k| is prime for k = 1, 2, . . . , 9. [Firoozbakht]
Submitted: 2004-07-18 06:01:53; Last Modified: 2019-02-05 21:59:46.
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