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Message boards : Proth Prime Search : PPS seive on 32-bit machine

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idbProject donor
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Joined: 27 Aug 08
Posts: 31
ID: 27882
Credit: 7,332,854
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321 LLR Bronze: Earned 10,000 credits (45,610)Cullen LLR Bronze: Earned 10,000 credits (10,673)PPS LLR Silver: Earned 100,000 credits (187,960)PSP LLR Bronze: Earned 10,000 credits (61,432)SoB LLR Bronze: Earned 10,000 credits (68,402)SR5 LLR Bronze: Earned 10,000 credits (34,304)SGS LLR Bronze: Earned 10,000 credits (54,976)TRP LLR Bronze: Earned 10,000 credits (42,199)Woodall LLR Bronze: Earned 10,000 credits (64,827)321 Sieve Gold: Earned 500,000 credits (584,242)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (25,451)PPS Sieve Silver: Earned 100,000 credits (201,471)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (147,454)TRP Sieve (suspended) Silver: Earned 100,000 credits (200,610)AP 26/27 Bronze: Earned 10,000 credits (44,589)PSA Turquoise: Earned 5,000,000 credits (5,551,704)
Message 18381 - Posted: 5 Oct 2009 | 5:11:25 UTC

After some rearrangement after the challenge I realise that I had downloaded, and run, a PPS seive task on one of my 32-bit machines.

It completed and validated so I guess that it is OK but, if there is some deeper reason that it is restricted to 64-bit only, it might need to be invalidated manually.

Anyone know _why_ PPS seive is 64-bit only, is it just a performance thing?

Task pps_sr2sieve_966058

Ian
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JohnProject donor
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Credit: 2,681,934
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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 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 18382 - Posted: 5 Oct 2009 | 5:40:09 UTC - in response to Message 18381.

After some rearrangement after the challenge I realise that I had downloaded, and run, a PPS seive task on one of my 32-bit machines.

It completed and validated so I guess that it is OK but, if there is some deeper reason that it is restricted to 64-bit only, it might need to be invalidated manually.

Anyone know _why_ PPS seive is 64-bit only, is it just a performance thing?

Task pps_sr2sieve_966058

Ian

The result is fine...there's actually a 32 bit Windows app available. And yes, it's purely a performance thing. At the current sieve depth of 1P, 32 bit machines are better utilized on the LLR side while 64 bit machines are still "optimal" for sieving.
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idbProject donor
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Joined: 27 Aug 08
Posts: 31
ID: 27882
Credit: 7,332,854
RAC: 0
321 LLR Bronze: Earned 10,000 credits (45,610)Cullen LLR Bronze: Earned 10,000 credits (10,673)PPS LLR Silver: Earned 100,000 credits (187,960)PSP LLR Bronze: Earned 10,000 credits (61,432)SoB LLR Bronze: Earned 10,000 credits (68,402)SR5 LLR Bronze: Earned 10,000 credits (34,304)SGS LLR Bronze: Earned 10,000 credits (54,976)TRP LLR Bronze: Earned 10,000 credits (42,199)Woodall LLR Bronze: Earned 10,000 credits (64,827)321 Sieve Gold: Earned 500,000 credits (584,242)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (25,451)PPS Sieve Silver: Earned 100,000 credits (201,471)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (147,454)TRP Sieve (suspended) Silver: Earned 100,000 credits (200,610)AP 26/27 Bronze: Earned 10,000 credits (44,589)PSA Turquoise: Earned 5,000,000 credits (5,551,704)
Message 18384 - Posted: 5 Oct 2009 | 6:51:31 UTC - in response to Message 18382.

Thanks.

Nice to know the time wasn't wasted.

Ian
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Profile John M. Johnson "Novex"Project donor
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Credit: 1,066,951
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321 LLR Bronze: Earned 10,000 credits (50,802)Cullen LLR Silver: Earned 100,000 credits (111,106)PPS LLR Silver: Earned 100,000 credits (101,350)PSP LLR Bronze: Earned 10,000 credits (15,210)SGS LLR Bronze: Earned 10,000 credits (27,055)TPS LLR (retired) Bronze: Earned 10,000 credits (67,826)Woodall LLR Bronze: Earned 10,000 credits (10,609)321 Sieve Bronze: Earned 10,000 credits (70,873)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (20,185)PPS Sieve Bronze: Earned 10,000 credits (20,034)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (24,551)TRP Sieve (suspended) Bronze: Earned 10,000 credits (40,040)AP 26/27 Silver: Earned 100,000 credits (159,148)PSA Silver: Earned 100,000 credits (344,961)
Message 18905 - Posted: 5 Nov 2009 | 19:18:49 UTC

I also was able to get only 1 of my 32 bit computers to do a PPS Sieve yesterday and posted about it asking some questions here:

http://www.primegrid.com/forum_thread.php?id=1526
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John M. Johnson "Novex"

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Message boards : Proth Prime Search : PPS seive on 32-bit machine

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