Mersenne prime Mersenne prime In mathematics, a Mersenne prime is a prime number that is one less than a power of two. That is, it is a prime number of the form for some integer . They are named after Marin Mersenne, a French Minim friar, who studied them in the early 17th century. The exponents which give Mersenne primes are 2, 3, 5, 7, 13, 17, 19, 31, ... and the resulting Mersenne primes are 3, 7, 31, 127, 8191, 131071, 524287, 2147483647, ... . If is a composite number then so is . ( is divisible by both and .)
17-11-70 that album producer Gus Dudgeon remixed the tracks to create a notably different sound from the original US LP mixes. In addition to level changes, Dudgeon's version also added some echo and other effects not present in the earlier mixes, which has drawn mixed reactions from fans. The 2017 Record Store Day special reissue features the six remained-unreleased songs from the concert, plus "Amoreena" (featured on the 1996 CD). The track listing for the first two sides is the same as the original 1970 release. Note Production Album 17-11-70 17-11-70 (US title "11-17-70"), released in 1971, is the fifth official