Sieve. (Sorry for the vagueness)

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Message boards : Sieving : Sieve. (Sorry for the vagueness)

Author	Message
Buddy Send message Joined: 28 Mar 14 Posts: 5 ID: 305878 Credit: 3,403 RAC: 0	Message 85660 - Posted: 17 May 2015 \| 13:23:48 UTC
	Sieve which is used by PrimeGrid?
	ID: 85660 \|

Michael Goetz Volunteer moderator Project administrator Send message Joined: 21 Jan 10 Posts: 14011 ID: 53948 Credit: 435,567,510 RAC: 868,496	Message 85661 - Posted: 17 May 2015 \| 13:59:37 UTC - in response to Message 85660.
	Unfortunately, without the question being less vague, it's impossible to give you a concise answer to your question. Perhaps if you were a bit more specific about what kind of sieving you're referring to and/or the purpose of the question we could give you answer that wouldn't rival "War and Peace" in length and take hours to write. :) ____________ My lucky number is 75898⁵²⁴²⁸⁸+1
	ID: 85661 \|

Buddy Send message Joined: 28 Mar 14 Posts: 5 ID: 305878 Credit: 3,403 RAC: 0	Message 85662 - Posted: 17 May 2015 \| 14:18:01 UTC - in response to Message 85661.
	I refer to this sieve[1]. I think it is the one used for primes, I thought it was used the sieve of Eratosthenes. Thank you for having responded to me. [1] https://sites.google.com/site/geoffreywalterreynolds/programs/sr2sieve
	ID: 85662 \|

Pooh Bear 27 Send message Joined: 10 May 09 Posts: 805 ID: 39821 Credit: 1,941,113,493 RAC: 1,381,311	Message 85663 - Posted: 17 May 2015 \| 14:27:30 UTC
	Sieving at PrimeGrid is a program that takes a bunch of numbers, does some fairly basic testing to see if any numbers in that list are not prime and takes them out of the pool of LLR testing. From the Wiki: Sieving - Sieving is the first step to prime finding. In general, a sieve separates wanted/desired elements from unwanted material using a tool such as a mesh, net or other filtration or distillation methods. The word "sift" derives from this term. In PrimeGrid's case, the desired elements ultimately are prime numbers and the unwanted material are composite numbers. Sieve applications used at PrimeGrid.
	ID: 85663 \|

Michael Goetz Volunteer moderator Project administrator Send message Joined: 21 Jan 10 Posts: 14011 ID: 53948 Credit: 435,567,510 RAC: 868,496	Message 85664 - Posted: 17 May 2015 \| 14:33:39 UTC - in response to Message 85662.
	I refer to this sieve[1]. I think it is the one used for primes, I thought it was used the sieve of Eratosthenes. Thank you for having responded to me. [1] https://sites.google.com/site/geoffreywalterreynolds/programs/sr2sieve Sr2sieve is one of many sieve programs that are used at PrimeGrid. Does that answer your question? ____________ My lucky number is 75898⁵²⁴²⁸⁸+1
	ID: 85664 \|

Buddy Send message Joined: 28 Mar 14 Posts: 5 ID: 305878 Credit: 3,403 RAC: 0	Message 85665 - Posted: 17 May 2015 \| 14:45:33 UTC - in response to Message 85664.
	Yes. :-)
	ID: 85665 \|

Message boards : Sieving : Sieve. (Sorry for the vagueness)