Eratosthenes, sieve of

systematic procedure for finding prime numbers (prime) that begins by arranging all of the natural numbers (1, 2, 3, …) in numerical order. After striking out the number 1, simply strike out every second number following the number 2, every third number following the number 3, and continue in this manner to strike out every nth number following the number n. The numbers that remain are prime. The procedure is named for the Greek astronomer Eratosthenes of Cyrene (c. 276–194 BC).
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Sieve of Eratosthenes — Sieve of Eratosthenes: algorithm steps for primes below 121 (including optimization of starting from prime s square). In mathematics, the sieve of Eratosthenes (Greek: κόσκινον Ἐρατοσθένους), one of a number of prime number sieves, is a simple,… … Wikipedia
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sieve of Eratosthenes — «EHR uh TOS thuh NEEZ», a method for finding prime numbers by writing down a series of whole numbers, beginning with 2, then crossing out all the second numbers except 2, all the third except 3, and so on until all but the prime numbers remain.… … Useful english dictionary
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sieve of eratosthenes — ˌerəˈtästhəˌnēz Usage: usually capitalized E Etymology: after Eratosthenes fl 3d century B.C. Greek astronomer and geographer : a device for finding prime numbers consisting of the writing down of the odd numbers from 3 up in succession and of… … Useful english dictionary
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Eratosthenes of Cyrene — (c. 276 bc–194 bc) Greek astronomer Eratosthenes was born in Cyrene, now in Libya, and educated at Athens. He then taught in Alexandria where he became tutor to the son of Ptolemy III and librarian. He was prominent in history, poetry,… … Scientists
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