The sum of n consecutive primes beginning
with n is n times the n_th prime.

1. I know one solution - find it!
2. Are there any others? - please comment.

n=3
The sum of 3 consecutive primes beginning with 3 is 3+5+7=15
which is 3 times the 3rd prime.  3*5=15

To try for more it would seem a program is the way to go.  You could probably be able to establish an upper bound using the prime counting function.

Posted by Jer on 2014-03-20 14:51:12