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.
It's a good thing Giant tortoises live as long as they do as they average only .25 MPH. As far as plants go, Bristlecone pines found in the White Mountains in California, have the longest life span of any plant or tree. One such pine named the Methuselah tree is estimated to be 4,725 years old. If you consider clams as animals and not just ingredients for soup then the quahog clam has quite an impressive life span. In 2007 scientists found a quahog clam off the north coast of Iceland which they believe to be 400 years old.
The tallest tree in the world is named Hyperion, which reaches 379.7 feet (115.7 meters). Redwoods can achieve a diameter of 24 feet (7 meters), and 1.6 million pounds (725,700 kg). These giants can live to be 2,000 years old and have graced the planet for more than 240 million years.