SS Ellan Vannin (1854) small shop and various donations were made. At their Annual General Meeting of 17 December 1856, it was passed that the Castletown Steam Navigation Company should donate £10 to this cause. (equivalent to £ in ) 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
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