This number is a prime.

                                                              148 6287894323

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The sum of all the 4k+3 primes from 3 to 1486287894323 is 141665900839^2, a perfect square. No smaller sum gives a perfect square. Found by Giovanni Resta and Oscar Volpatti. [Rivera]

Submitted: 2020-06-12 21:13:03;   Last Modified: 2020-06-12 21:19:17.
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