Lindsey Creek tree close to twice the size of the largest living single-stem tree, the giant sequoia known as General Sherman. Skip Johnson, a Fieldbrook logger interviewed in 1971, testified that he witnessed the Lindsey Creek Tree after it was lying on the ground. He reported it as the tallest tree in Fieldbrook. He stated that a family member measured its diameter at 19 feet at 130 feet off the ground, and 9.5 feet at 260 feet off the ground, and its total height slightly exceeded 390 feet. If true, it was taller than any other known tree. Hyperion, another coast redwood (Sequoia
Largest known prime number the progression of the largest known prime number in ascending order. Here M = 2 − 1 is the Mersenne number with exponent "n". The longest record-holder known was M = 524,287, which was the largest known prime for 144 years. No records are known before 1456. GIMPS found the fourteen latest records (all of them Mersenne primes) on ordinary computers operated by participants around the world. A list of the 5,000 largest known primes is maintained by Chris K. Caldwell, of which the twenty largest are listed below. Largest known prime number The largest known prime number () is