SS Ellan Vannin (1854) "Ellan Vannin" proceeded across to the new pier where she was opened to the general public. The "Ben-my-Chree", which was returning to Douglas following a pleasure cruise around the Island passed close by and greeted the "Ellan Vannin" by firing two guns. The "Ellan Vannin" entered service under the command of Captain Joseph Skillicorn, an experienced mariner who prior to his appointment had been in the employ of the Isle of Man Steam Packet Company serving on the "Mona's Queen with the rank of First Officer. Mainly the "Ellan Vannin" would ply between Castletown, Isle of Man and Whitehaven, Cumberland
Largest known prime number Largest known prime number The largest known prime number () is 2 − 1, a number with 23,249,425 digits. It was found by the Great Internet Mersenne Prime Search (GIMPS) in 2017. Euclid proved that there is no largest prime number, and many mathematicians and hobbyists continue to search for large prime numbers. Many of the largest known primes are Mersenne primes. , the seven largest known primes are Mersenne primes. The last sixteen record primes were Mersenne primes. The fast Fourier transform implementation of the Lucas–Lehmer primality test for Mersenne numbers is fast compared to other known primality tests