Surely all funsters carrying smartphones in their pockets immediately see the need for the "Find this sequence of digits in pi" app available at http://fathom.info/pi. This seems to be implemented in the obvious way: the app itself is 47.68 MB large, which is precisely what you would need to store 100,000,000 digits at two decimal digits in each byte. Loading and searching both take a while. At the other end of the spectrum, the app could be tiny and just include an algorithm to generate the digits itself. It would end up quite slow, certainly. But for some trade-off between data transmission time and cpu speed, that would be the right implementation. Are there any other interesting points on this trade-off curve? What might one want to do, other than pre-compute all or none of the digits? --Michael -- Forewarned is worth an octopus in the bush.