Snaefell Wheel Snaefell Wheel The Snaefell Wheel (also known as Lady Evelyn) is a waterwheel in Laxey, Isle of Man. The wheel stands in the washing floors in Laxey Glen Gardens, approximately 700 metres south of the larger Laxey Wheel. The wheel was unveiled with the name "Lady Evelyn" to mark the extensive work of Evelyn Jones in her support of the Laxey Mines Research Team. The wheel was purchased by the Snaefell Mining Company in 1865. Built by Messrs Leigh and Gilbert Howell of the Hawarden iron works in Flintshire, north Wales, it was one of two identical 50 ft (15.24
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