The book is now available! 1800
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:

Single Curio View:   (Seek other curios for this number)


13+17+31+37+71+73+79+97+107+113+149+157+167+179+199+311 = 2^3*3^2*5^2 is the sum of the first 2^4=4^2 emirps and a powerful number, using the first three primes only. [Herrnberger]


  Submitted: 2009-05-23 05:27:34;   Last Modified: 2009-05-23 17:34:00.

Prime Curios! © 2000-2017 (all rights reserved)