8

This number is a composite.

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+ The second smallest Fibonacci number equal to the sum of two consecutive Fibonacci primes: 8 = 3 + 5. [Rivera]

+ 8 = 2^3 is the only possible cube "centered and sandwiched" in the middle of two pairs of twins (3,5) and (11,13). That is to say 2^3=8=(3+13)/2=(5+11)/2. [Rivera]

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