Probably "m.", with 623,000,000 results. Likely more with https considered. https://www.google.com/search?num=100&newwindow=1&espv=2&q=inurl%3Ahttp%3A%2F%2Fm

Probably "m.", with 623,000,000 results. Likely more with https considered. https://www.google.com/search?num=100&newwindow=1&espv=2&q=inurl%3Ahttp%3A%2F%2Fm https://www.google.com/search?num=100&newwindow=1&espv=2&q=i....