8 years, 8 months, 14 days
Its nice to see that this project of Satoshi Nakamoto is still alive and now is being widely accepted as the currency of the future.
Satoshi Nakamoto's invention of the Blockchain for bitcoin made it the first digital currency to solve the double spending problem, without the use of a trusted authority or central server. You can find the White Paper of Bitcoin here https://bitcoin.org/bitcoin.pdf.
You can also watch this simple explanation of what bitcoin is.
The Blockchain was seen to be useful for Cryptocurrency now it is being used in wide areas of Industries as seen in the video below.