563
This number is a prime.
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The smallest prime that can be represented as sum of
squares of first n successive numbers ending
with the same digit, i.e., 1^2+11^2+21^2, (n=3). [Loungrides]
Submitted: 2019-12-29 18:39:42; Last Modified: 2020-02-01 19:42:42.
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