This number is a prime.

                                                              148 6287894323

Just showing those entries submitted by 'Rivera': (Click here to show all)

+ 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]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell