THIS CHALLENGE CACHE IS LOCATED AT THE POSTED COORDINATES
Please see the description for the logging requirements
Numbers. We are fascinated by them. We love to celebrate milestones and goals met of various numbers. One hundred always seems to be a significant number that gives us a sense of accomplishment.
This is a challenge cache, so you must complete the challenge in order to log a "Found it" for the cache. In addition to finding the cache and signing the physical log, to qualify for a "Found It" online, you must:
Find 100 challenge geocaches. For the purposes of this challenge, a challenge geocache will be a geocache with the word "challenge" in the title. Further a challenge geocache requires that geocachers meet a geocaching-related qualification or series of tasks before the challenge geocache can be logged.
Note: The Difficulty level shown takes into account both finding the actual cache container and completing the challenge. Finding the physical cache container is a 1.5. This is a log only cache that did start out with a pencil, but as always bring a writing stick since the provided one often goes missing.
Rules for this Challenge Cache:
Use the challenge checker below to check and post your results in your log entry. You may sign the log before completing the challenge. If you have done this, please use a "Write note" log to record your find and then a "Found it" log once you have completed the challenge.

geo51 fulfills challenge Challenge of the Century:100 "Challenge" Challenge (GCBT3RT) according to https://project-gc.com/Challenges/GCBT3RT/116752