1861

This number is a prime.

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The smallest prime formed from the sum of the squares of the first n not prime-free numbers, in this case, for n = 8 we have: 4^2 + 8^2 + 9^2 + 12^2 + 16^2 + 18^2 + 20^2 + 24^2 = 1861. [Post]

Submitted: 2005-11-18 01:53:00;   Last Modified: 2008-01-30 11:28:00.
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