Ellan Vannin (poem) Ellan Vannin (poem) Ellan Vannin (the Manx-language name of the Isle of Man) is a poem and song, often referred to as "the alternative Manx national anthem", the words of which were written by Eliza Craven Green in 1854 and later set to music by someone called either J. Townsend or F. H. Townend (sources vary). The Manx-language name Ellan Vannin is commonly mispronounced in renditions of the song, including in the Bee Gees version, since written Manx uses an orthography based on Welsh rather than Irish/Scots gaelic, which does not accurately transcribe the "ʲə" sound found in the word
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