What is $71mm?

[Muse]

i think only accountants use mm these days

Well, it's interesting, I use it but only in my head... and I don't think mm or MM, I think "well, a million is a thousand thousand." Just for perspective. I mean a million is approaching what they call "astronomical numbers" so I try to think of something to make it real in my mind and what I use is a thousand thousands.

But the Romans? Did they really use that notation? MM?

 

[brianmanahan]

Well, it's interesting, I use it but only in my head... and I don't think mm or MM, I think "well, a million is a thousand thousand." Just for perspective. I mean a million is approaching what they call "astronomical numbers" so I try to think of something to make it real in my mind and what I use is a thousand thousands.

But the Romans? Did they really use that notation? MM?

per this page: https://gettingpeopleright.com/resources/what-does-m-and-mm-mean-in-accounting/

"In Roman numerals, a million is M with a horizontal bar over the letter. A horizontal bar over any Roman numeral multiplies its value by 1,000: C becomes 100,000, X becomes 10,000 and M with a bar becomes 1,000 times 1,000, or 1 million... Rather than use the barred M, however, accounting went with MM as an abbreviation for a million. For example, 1MM equals 1 million, $34MM equals $34 million and so on."

the rest of the world (english-speaking at least) has moved on to k for 1000 and M for million though