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.
Long-Living Tree Types. Conifer trees live longer than other tree species. The lifespan of a tree depends on the tree variety and its growing conditions. Trees have some of the longest lifespans in the plant kingdom, with some conifer species outliving all other varieties. Long-living tree types may stand alone or live in dense forests, such as the redwood and sequoias in California, or they may be used in residential landscaping as ornamental trees.