I think I need to change the error threshold in the neural net I'm writing. After 7,548,600 iterations the error is 0.4069111311875221. I don't think it's going to reach 0.01 (the threshold I had set) in the near future (it's been running for over 16 hours). Time to change what the criteria for "problem solved" is.
In related news, Excel appears to only draw 32,000 points when told to create an X/Y scatter graph:
The initial error was 1.000167343112047, but I've trimmed the scale to try and show the curve.