m probably means meter here. It sounds like you are reading it as million.
But it is a great example of why using abbreviations is almost always a bad idea on the Internet. It saves the one author a few tenths of a second but wastes time for thousands of readers when ambiguity strikes.
Yep. I forgot NH is mostly american, and they don't use the metric system. 1m in Europe would obviously be one metter, but 1M one million, and 1min one minute.
I'll avoid saving a few keystrokes next time, it's not worth it.
But it is a great example of why using abbreviations is almost always a bad idea on the Internet. It saves the one author a few tenths of a second but wastes time for thousands of readers when ambiguity strikes.