I installed the Sage Math app, which is in beta for Android: https://play.google.com/store/apps/details?id=org.sagemath.droid&hl=en It's flaky but I don't know of anything better. Charles Greathouse Analyst/Programmer Case Western Reserve University On Mon, Jul 8, 2013 at 2:19 PM, Robert Baillie <rjbaillie@frii.com> wrote:
I recently acquired an Android smart phone, and have been surpised at all the things it can do and the apps it can run.
I installed "Primality Test" by the Mincemeat team. This is the only prime testing app I could find that works with numbers of arbitrary precision. I didn't find any factoring apps that go beyond 10^18, and those appear to do factoring only by trial division. Are there better ones out there? (I'm already working on one for my own amusement, but I'd like to find a good one).
Just for fun, I installed a spectrum analyzer (Spectral Audio Analyzer by RadonSoft): it displays the frequencies in sounds that are picked up by the microphone.
What are your favorite math apps?
In particular, are there any calculators where you can type expressions (like "sqrt(-5) + sin(pi/7)^2") instead of just punching keys on a keypad?
Bob Baillie
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