title: Calculating Pi to millions of places on a Raspberry PI
body: <p>I have this odd goal: dedicate a Raspberry PI to calculating the value of Pi to millions of digits. Running 24/7, I have 496 weeks before my (statistically speaking) demise. So, researching on SO, I <a href="https://stackoverflow.com/questions/9004789/1000-digits-of-pi-in-python">found this page</a> that might be an answer to my quest. Question: can anyone point me to more information on this specific algorithm and whether or not it is valid and accurate for a gazillion digits? Or, if this dog can't hunt, point me to one that can. The algorithm must not consume large amounts of memory -- a hard drive will do that. Thoughts?</p>