Prime Curios!: 341

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The smallest member of the series n(n + 1 ) - 1 which, if composite, is not the product of two smaller primes in the series of the form 10k - 1 or 10k + 1. [McNamara]

Submitted: 2002-01-09 01:04:23; Last Modified: 2008-01-30 11:28:00.