Skip to content

Project Euler 3 Mystery Cache

Hidden : 9/7/2014
Difficulty:
2 out of 5
Terrain:
1.5 out of 5

Size: Size:   micro (micro)

Join now to view geocache location details. It's free!

Watch

How Geocaching Works

Related Web Page

Please note Use of geocaching.com services is subject to the terms and conditions in our disclaimer.

Geocache Description:

Acknowledgements


This cache was inspired by Project Euler.

General notes


  • To solve Project Euler puzzles, you will probably have to write a computer program.
  • Many of the containers are small, and contain neither pen nor pencil.
  • There are explicit finding notes in each geochecker.

The puzzle


The prime factors of 13195 are 5, 7, 13, and 29. Each occurs exactly once in the factorization.

Define f(n) as the largest prime factor of n, and g(n) as the sum of all of the prime factors.

For example,

100 = 2 ⨉ 2 ⨉ 5 ⨉ 5,

and so,

f(100) = 5,
g(100) = 2 + 2 + 5 + 5 = 14.

To find this cache, calculate:

  • g(67108864)
  • g(36)
  • f(475262344414189)
  • 0
  • g(16)
  • g(17592567)

Additional Hints (Decrypt)

Frr gur trbpurpxre.

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)