Search results
Results from the WOW.Com Content Network
Sieve of Eratosthenes: algorithm steps for primes below 121 (including optimization of starting from prime's square). In mathematics, the sieve of Eratosthenes is an ancient algorithm for finding all prime numbers up to any given limit.
Sieve of Sundaram: algorithm steps for primes below 202 (unoptimized). The sieve starts with a list of the integers from 1 to n.From this list, all numbers of the form i + j + 2ij are removed, where i and j are positive integers such that 1 ≤ i ≤ j and i + j + 2ij ≤ n.
Chen's theorem, which shows that there are infinitely many primes p such that p + 2 is either a prime or a semiprime (the product of two primes); a closely related theorem of Chen Jingrun asserts that every sufficiently large even number is the sum of a prime and another number which is either a prime or a semiprime.
Python, sometimes written Pytho, presided at the Delphic oracle, which existed in the cult center for its mother, Gaia, "Earth", Pytho being the place name that was substituted for the earlier Krisa. [1] Greeks considered the site to be the center of the Earth, represented by a stone, the omphalos or navel, which Python guarded.
The son of Aglaos, Eratosthenes was born in 276 BC in Cyrene.Now part of modern-day Libya, Cyrene had been founded by Greeks centuries earlier and became the capital of Pentapolis (North Africa), a country of five cities: Cyrene, Arsinoe, Berenice, Ptolemias, and Apollonia.
The following is pseudocode which combines Atkin's algorithms 3.1, 3.2, and 3.3 [1] by using a combined set s of all the numbers modulo 60 excluding those which are multiples of the prime numbers 2, 3, and 5, as per the algorithms, for a straightforward version of the algorithm that supports optional bit-packing of the wheel; although not specifically mentioned in the referenced paper, this ...
[2] In the second section, the diegesis (account), Lysias has Euphiletos provide a narrative of the events leading to the murder. He describes how he married, and how his wife was seen by Eratosthenes at her mother-in-law's funeral. According to Euphiletos, Eratosthenes used Euphiletos' slave to persuade his wife to have an affair with him. [3]
The crater is believed to have been formed about 3.2 billion years ago. At low Sun-angles, this crater is prominent due to the shadow cast by the rim. When the Sun is directly overhead, however, Eratosthenes visually blends into the surroundings, and it becomes more difficult for an observer to locate it.