This number is a prime.

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+ The smallest composite 493009335 = 3^5*5*7^4*13^2, such that SPF(493009335)=74, where 493009335+74=493009409 and 493009335-74=493009261 are the next and the previous primes to 493009335, respectively. Found by Farideh Firoozbakht. [Rivera]

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