Meaning of the outputted numbers whilst fitting?

Part 1 (2019)
1

When running learn.fit() or learn.fit_one_cycle(), the following is display in jupyter:

image
image.png754×147 5.7 KB

From my understanding the first 2 numbers are the number of batches completed out of the total.

The middle is the time taken for all the batches so far and the predicted time remaining.

But what is the last number?

2

Training or validation loss, depending on which stage it’s in.