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Message boards : Sieving : Finding a factor bonus

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Profile Buster Gunn
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Joined: 10 Sep 06
Posts: 6
ID: 3447
Credit: 20,827,327
RAC: 0
321 LLR Amethyst: Earned 1,000,000 credits (1,928,254)Cullen LLR Ruby: Earned 2,000,000 credits (2,095,072)ESP LLR Bronze: Earned 10,000 credits (46,223)PPS LLR Amethyst: Earned 1,000,000 credits (1,466,151)PSP LLR Amethyst: Earned 1,000,000 credits (1,523,867)SoB LLR Amethyst: Earned 1,000,000 credits (1,691,697)SR5 LLR Amethyst: Earned 1,000,000 credits (1,193,192)SGS LLR Amethyst: Earned 1,000,000 credits (1,473,726)TPS LLR (retired) Bronze: Earned 10,000 credits (72,674)TRP LLR Amethyst: Earned 1,000,000 credits (1,652,256)Woodall LLR Ruby: Earned 2,000,000 credits (2,110,130)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (35,604)PPS Sieve Silver: Earned 100,000 credits (182,034)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Gold: Earned 500,000 credits (678,662)TRP Sieve (suspended) Bronze: Earned 10,000 credits (25,350)GFN Ruby: Earned 2,000,000 credits (4,661,120)
Message 7276 - Posted: 16 Oct 2007 | 7:34:43 UTC

Over on Riesel Sieve, a bonus of 3 cobblestones is awarded for finding a factor. Is there any bonus here for either PSP or GCW? If not, why not?

Rytis
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Joined: 22 Jun 05
Posts: 2651
ID: 1
Credit: 64,887,580
RAC: 11,133
321 LLR Silver: Earned 100,000 credits (104,475)Cullen LLR Silver: Earned 100,000 credits (291,372)ESP LLR Bronze: Earned 10,000 credits (18,156)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (15,259)PPS LLR Amethyst: Earned 1,000,000 credits (1,314,555)PSP LLR Silver: Earned 100,000 credits (116,517)SoB LLR Silver: Earned 100,000 credits (282,655)SR5 LLR Bronze: Earned 10,000 credits (14,071)SGS LLR Silver: Earned 100,000 credits (100,082)TPS LLR (retired) Silver: Earned 100,000 credits (111,607)TRP LLR Emerald: Earned 50,000,000 credits (57,937,913)Woodall LLR Silver: Earned 100,000 credits (101,463)321 Sieve (suspended) Silver: Earned 100,000 credits (201,501)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (214,653)Generalized Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (14,200)PPS Sieve Silver: Earned 100,000 credits (491,193)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (200,232)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,453,872)AP 26/27 Silver: Earned 100,000 credits (473,058)GFN Silver: Earned 100,000 credits (205,132)WW Bronze: Earned 10,000 credits (84,000)PSA Bronze: Earned 10,000 credits (97,541)
Message 7277 - Posted: 16 Oct 2007 | 9:05:31 UTC - in response to Message 7276.
Last modified: 16 Oct 2007 | 14:22:13 UTC

Over on Riesel Sieve, a bonus of 3 cobblestones is awarded for finding a factor. Is there any bonus here for either PSP or GCW? If not, why not?

There is no bonus for finding a factor. It does not involve any additional computation, and the factors occur quite often, so standard crediting scheme is OK.

[edit] But I may still be convinced :)
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meddy2065
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Joined: 4 Jan 07
Posts: 6
ID: 4634
Credit: 1,097,430,693
RAC: 362,377
321 LLR Ruby: Earned 2,000,000 credits (2,223,118)Cullen LLR Ruby: Earned 2,000,000 credits (4,040,631)ESP LLR Ruby: Earned 2,000,000 credits (2,117,344)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,624,196)PPS LLR Sapphire: Earned 20,000,000 credits (25,436,623)PSP LLR Ruby: Earned 2,000,000 credits (2,656,383)SoB LLR Amethyst: Earned 1,000,000 credits (1,872,398)SR5 LLR Gold: Earned 500,000 credits (763,591)SGS LLR Ruby: Earned 2,000,000 credits (4,234,998)TPS LLR (retired) Bronze: Earned 10,000 credits (20,987)TRP LLR Ruby: Earned 2,000,000 credits (3,914,739)Woodall LLR Amethyst: Earned 1,000,000 credits (1,682,684)321 Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,180,411)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (73,486)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (15,360,482)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,002,591,911)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (4,415,973)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (4,575,221)AP 26/27 Turquoise: Earned 5,000,000 credits (5,674,016)GFN Jade: Earned 10,000,000 credits (12,950,077)
Message 7341 - Posted: 22 Oct 2007 | 18:34:20 UTC

i may seem extremely stupid but what is a factor? i have found 115 factors but do not know what they are.

JustasProject donor
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ID: 4525
Credit: 574,534
RAC: 0
Cullen LLR Bronze: Earned 10,000 credits (12,986)SGS LLR Bronze: Earned 10,000 credits (10,415)TPS LLR (retired) Bronze: Earned 10,000 credits (23,534)Woodall LLR Bronze: Earned 10,000 credits (12,493)321 Sieve (suspended) Bronze: Earned 10,000 credits (99,911)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (242,933)PPS Sieve Silver: Earned 100,000 credits (122,728)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (37,209)
Message 7342 - Posted: 22 Oct 2007 | 18:45:00 UTC - in response to Message 7341.

i may seem extremely stupid but what is a factor? i have found 115 factors but do not know what they are.


http://en.wikipedia.org/wiki/Factorization
____________

JohnProject donor
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Joined: 21 Feb 06
Posts: 2875
ID: 2449
Credit: 2,681,934
RAC: 0
321 LLR Bronze: Earned 10,000 credits (11,773)Cullen LLR Bronze: Earned 10,000 credits (14,945)ESP LLR Bronze: Earned 10,000 credits (26,855)PPS LLR Bronze: Earned 10,000 credits (84,876)PSP LLR Bronze: Earned 10,000 credits (15,311)SoB LLR Bronze: Earned 10,000 credits (21,440)SR5 LLR Bronze: Earned 10,000 credits (29,270)SGS LLR Bronze: Earned 10,000 credits (26,616)TPS LLR (retired) Bronze: Earned 10,000 credits (36,288)TRP LLR Bronze: Earned 10,000 credits (41,655)Woodall LLR Bronze: Earned 10,000 credits (15,807)321 Sieve (suspended) Bronze: Earned 10,000 credits (20,014)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (23,405)PPS Sieve Bronze: Earned 10,000 credits (36,192)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (20,306)TRP Sieve (suspended) Bronze: Earned 10,000 credits (21,738)GFN Bronze: Earned 10,000 credits (86,217)PSA Ruby: Earned 2,000,000 credits (2,143,756)
Message 7344 - Posted: 22 Oct 2007 | 19:00:04 UTC - in response to Message 7341.

i may seem extremely stupid but what is a factor? i have found 115 factors but do not know what they are.

PrimeGrid offers two subprojects that find "factors": GCW Sieve and PSP Sieve.

The factors you are finding remove candidates from being primality tested (LLR): Cullen/Woodall LLR and PSP LLR (not BOINC yet).

The sieves find factors for the possible prime candidates. After a factor is found, that candidate is removed because it is no longer a possible prime.

Here's an example of a recent factor found in the manual GCW Sieve:

13384653648943 | 3382339*2^3382339-1

This means that 13384653648943 is a factor of 3382339*2^3382339-1. Therefore, 3382339*2^3382339-1 is not prime and so does not have to be primality tested (LLR). 3382339*2^3382339-1 will be removed from the possible prime candidates.
____________

meddy2065
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Joined: 4 Jan 07
Posts: 6
ID: 4634
Credit: 1,097,430,693
RAC: 362,377
321 LLR Ruby: Earned 2,000,000 credits (2,223,118)Cullen LLR Ruby: Earned 2,000,000 credits (4,040,631)ESP LLR Ruby: Earned 2,000,000 credits (2,117,344)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,624,196)PPS LLR Sapphire: Earned 20,000,000 credits (25,436,623)PSP LLR Ruby: Earned 2,000,000 credits (2,656,383)SoB LLR Amethyst: Earned 1,000,000 credits (1,872,398)SR5 LLR Gold: Earned 500,000 credits (763,591)SGS LLR Ruby: Earned 2,000,000 credits (4,234,998)TPS LLR (retired) Bronze: Earned 10,000 credits (20,987)TRP LLR Ruby: Earned 2,000,000 credits (3,914,739)Woodall LLR Amethyst: Earned 1,000,000 credits (1,682,684)321 Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,180,411)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (73,486)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (15,360,482)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,002,591,911)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (4,415,973)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (4,575,221)AP 26/27 Turquoise: Earned 5,000,000 credits (5,674,016)GFN Jade: Earned 10,000,000 credits (12,950,077)
Message 7352 - Posted: 23 Oct 2007 | 5:07:17 UTC

thanx for such a helpful explanation.

Message boards : Sieving : Finding a factor bonus

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