Twitter had 284m MAUs, and 227m mobile MAUs in Q3 2014

"Third Quarter 2014 Operational Highlights
Average Monthly Active Users (MAUs) were 284 million for the third quarter, an increase of 23% year-over-year.
Average Mobile MAUs represented around 80% of total MAUs.
Timeline views reached 181 billion for the third quarter of 2014, an increase of 14% year-over-year.
Advertising revenue per thousand timeline views reached $1.77 in the third quarter of 2014, an increase of 83% year-over-year.
Revenue - Revenue for the third quarter of 2014 totaled $361 million, an increase of 114% compared to $169 million in the same period last year.
Advertising revenue totaled $320 million, an increase of 109% year-over-year.
Mobile advertising revenue was 85% of total advertising revenue.
Data licensing and other revenue totaled $41 million, an increase of 171% year-over-year.
International revenue totaled $121 million, an increase of 176% year-over-year.
International revenue was 34% of total revenue.
Net loss - GAAP net loss was $175 million for the third quarter of 2014 compared to a GAAP net loss of $65 million in the same period last year. GAAP net loss for the third quarter of 2014 included $170 million of stock-based compensation expense."
Source:  Twitter's Q3 2014 results, 27th October 2014
Earlier - 271m & 211m in Q2 2014