Prime Curios!: 569

569
(another Prime Pages' Curiosity)

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The number 569 and its twin prime share an interesting property: both fib(569) and fib(569 + 2) are primes as well. [Dobb]

9^2 + 8^2 + 7^2 + 6^2 + 5^2 + 4^2 + 3^2 + 2^2 + 1^2 + 2^2 + 3^2 + 4^2 + 5^2 + 6^2 + 7^2 + 8^2 + 9^2 = 569. [Silva]

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