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SmarandacheRadu triplets; integers n such that there are no primes between the smaller and larger of S(n) and S(n+1): 224, 2057, 265225, ... . The largest known SmarandacheRadu triplet is 270,329,975,921,205,253,634,707,051,822,848,570,391,313. Here S(n) is the Smarandache Function, i.e., the smallest integer such that S(n)! is divisible by n. [Weisstein]
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