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.
1 The Oldest, Tallest, Widest and Biggest Trees in the World. 2  The Oldest Tree in the World: Old Tjikko (9,550 Years Old) 3  The Oldest Non-Clonal Tree in the World: Methuselah (4,845 Years Old) 4  The Tallest Tree in the World: Hyperion (115.6 meters/379' 4)