The maximum length of a credit card number is 19 digits, with the maximum length of the account number field being 12 digits (initial six-digit issuer identifier minus the final digit check number). Each issuer has 1 trillion possible account numbers.
The oldest known blue oak is in Sequoia National Park and estimated to be about 400 years old. Deciduous oaks native to the eastern United States are also long-lived. White oak (Quercus alba) is the longest-lived, with an average life of 300 years and maximum life span of 600 years in USDA zones 3b through 8b. Southern red oak (Quercus falcata) grows in USDA zones 7 through 9 and reaches 275 years.
How long do fruit trees live? With proper selection, planting and care, fruit trees can be productive for 20 to 30 years or more, even in nonideal conditions. Well-tended specimens of most kinds of fruit trees are capable of living much longer than their expected productive or economic lives, still producing some fruit. Many stone fruits (peaches and plums, for example) tend to have longest life spans in dry western climates. Approximate expected productive life: