The maximum length of the number of a credit card can be 19 digits, and the length of the account field can maximum be 12 digits. Each issuer can have a trillion possible numbers of an account. The final digit on a credit card number is a check one, similar to a checksum. It confirms the initial digits of the number and prevents the attempts to invent card numbers.
Longest lasting empire in history. The Roman Empire is considered to have been the most enduring in history. The formal start date of the empire remains the subject of debate, but most historians agree that the clock began ticking in 27 BC, when the Roman politician Octavian overthrew the Roman Republic to become Emperor Augustus.
Stretching from Turkey and Iraq to Turkmenistan and Pakistan, the Islamic Republic of Iran is the worldâs 17th largest country in terms of territory, comprising around 1,648 thousand square kilometres. It is one of the worldâs oldest continuous major civilizations. It has a population of around 78.3 million.