22571

This number is a prime.

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{22531, 22541, 22543, 22549, 22567, 22571} is the smallest set of six consecutive primes (p, q, r, s, t, u) such that u divides (p*q*r*s*t-1). Note that 22571 is also expressible as (23^3+102^2). [Bajpai]