FACTBOX: Things you might not know about ballistic bitcoin

By Jemima Kelly

LONDON (Reuters) - Bitcoin rocketed to another record high close of $16,000 on the Luxembourg-based Bitstamp exchange on Thursday after gaining more than $4,000 in just 48 hours, stoking concerns that a rapidly swelling bubble could be set to burst.

There were huge disparities between prices across different exchanges. On GDAX, one of the biggest, the price reached $19,500.

Here are some facts that you might not know about the largest and best-known cryptocurrency.

(Reporting by Jemima Kelly; editing by Mark Heinrich)