Posted by **Mahler** on Thursday, May 9, 2013 at 9:53am.

Let N be the sum of all prime powers that can be written as 4^n+n^4 for some positive integer n.

What are the last 3 digits of N?

Details and assumptions:

A prime power is a number of the form pk, where p is a prime and k is a positive integer. Examples: 3,9,16.

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