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.
Californiaâs storied redwood trees are probably best-known as the tallest trees in the world, towering 350 to 400 feet tall. The conifers are a fast-growing tree, growing 3 to 5 feet per year in the first five years and reaching 90 feet tall by 25 years. The average life span of a redwood tree is more than 600 years. Only two species of redwood trees are still found in North America, the coast redwood and the giant sequoia.