SS Ellan Vannin (1854) SS Ellan Vannin (1854) SS (RMS) "Ellan Vannin" was an iron-built packet steamer which was operated out of Castletown, Isle of Man for the Castletown Steam Navigation Company (also referred to as the Castletown Steam Packet Company) to Liverpool and Whitehaven. Her name, Ellan Vannin, came from the Gaelic term by which the Isle of Man is known. "Ellan Vannin" was built by John Laird and Co. Ltd, Wallasey Pool, Birkenhead and was launched by Mrs. H. Houldsworth at 13:00hrs on Saturday 24 June 1854. Length 170'; beam 21' (exclusive of the paddle boxes) 39' overall. "Ellan Vannin" was powered
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