A palindromic number, below 2000, thrice a square, is the sum of nine consecutive primes.
Enough said.
What number(s) complies(comply)?
Looking through a list of tripled squares yields only one candidate palindrome:
3*11^2 = 363
It turns out this number is the sum of 9 consecutive primes:
23+29+31+37+41+43+47+53+59=363
The next candidate is 3*88^2=23232
But I don't care to check for the sum of primes around 2581. It does seem unlikely.

Posted by Jer
on 20150119 10:28:32 