5516281

This number is a prime.

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5516281 is the smallest prime p such that p+1 = 2 times a prime, p+2 = 3 times a prime, p+3 = 4 times a prime, p+4 = 5 times a prime, p+5 = 6 times a prime and p+6 = 7 times a prime. [Firoozbakht]