failing tests for m-n pandigital numbers
make the tests pass
borrowed code for fibonacci numbers and tests
failing tests for this weird property
woops
we need to know if numbers divide other numbers
failing tests for a function to work out sequences of divisors
I am a bad programmer
the bug I didn't find
make the tests pass
this works but is far too slow
we'll need this
we no longer need this
this is faster, but harder to read - needs to be split up
commit the test that actually tells you what's gone wrong