For some reason, there are many people who try to memorize hundreds and thousands of digits of pi (3.14159265...). As a mathematician, I don't understand the need for this. No matter how many digits you have, you just have an approximation for pi. A very good approximation, but still an approximation. As a scientist (did you know that MathProfessor is also a PhysicsProfessor?), I see no reason to have more than a hand full of decimal places. This is usually plenty, and please don't get me started on significant figures...
This challenge will help you learn pi to the millionths place. You are going to do this (and find at least 25 caches along the way) by completing the Week of Pi. On the first day of the week, you must find at least 3 caches. On the second day of the week, you must find at least 1 cache. The next day you must find at least 4 caches, and so on for the rest of the week. Day four requires at least 1 cache, day five requires at least 5 caches, day six requires at least 9 caches, and day seven requires at least 2 caches. Get it? 3.141592... The start of pi.
Updated September 26, 2015. Evidently, the original challenge format was not legal as per Groundspeak Rules. So to make it compliant, the challenge is now to find AT LEAST 3 caches the first day, AT LEAST 1 cache the second day, AT LEAST 4 caches the third day, etc until the seventh day when you find AT LEAST 2 caches. If you have questions, just shoot me a message.
I completed my Week of Pi December 19 through December 25 in 2014. You can complete yours at any time. Previous finds are allowed (in fact, you may have already completed the challenge), and your finds can be any type of cache. Just submit a list of days and GC codes with your log and you are good to go.