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This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).
The start of the only known (as of 2008) gigantic case of 3 consecutive primes or prp's in arithmetic progression: 19067408*2^33333-12539 + 6270*n, for n = 0, 1, 2. Only the last term is proven prime. [Andersen and Davis]
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