We see that the teleprinter is a transceiver that mechanically converts the operator’s key presses into a 5-digit binary code. For example, ‘y’ = 10101.

Next, select the Bin (Binary) radio button. This will convert the digit from Decimal to Binary. For example, I opted to convert 2015 into Binary, and the converted digit came to 11111011111.

Computers use binary to store data. Each binary digit, the 0 or 1, is called a "bit" to make a binary number. All software, music and documents are stored using binary code.

This quest for ever-higher binary bits of pi has been ongoing for a number of years, with the former single-digit record held by Colin Percival, founder of the Tarsnap online backup service.