1)
Message boards :
Aggie The Pew message board
(Message 162839)
Posted 4 days ago by Scott Brown
All back to double silver or better.
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2)
Message boards :
Generalized Fermat Prime Search :
DO YOU FEEL LUCKY?
(Message 162806)
Posted 5 days ago by Scott Brown
3 years ago when manual sieving was paused, I was
removing 400,000 GFN-22 factors for the range [2-400M] per year.
So, for 5 years, I could remove 2M factors.
My current hardware is 5 times faster, so that means I could remove 10M factors in 5 years.
Looking at a 1M range out of [2-400M] means I could sieve out 25,000 factors in 5 years.
Using GFN-22, I could only do 2,000 candidates in 5 years.
Without getting into the detailed math on this, your logic here is fundamentally flawed because it assumes a constant rate of sieving (i.e., that we have a constant rate of removal of factors). This simply is not true with sieves. The deeper we go into a sieve, the slower the removal of factors becomes...a great deal slower! In fact, the overwhelming majority of factors removed occurs earlier in the sieve. Indeed, it is quite likely that over a 5-year period as you note above, the number of factors removed during year one would exceed the number of factors removed over all 4 of the remaining years.
Additionally, there is also another assumption that may or may not be true, and that is that hardware improvements over those 5 years is consistent across applications. This is probably not the case. It could be that the sieve application actually gains more form the hardware improvements than the GFN application...it could be the opposite where the GFN app gains more (each, respectively, being an argument for more or less need of sieving). My own experiences over a largish variety of hardware and long-term experience is that the latter is more typical than the former, at least modestly.
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3)
Message boards :
Aggie The Pew message board
(Message 162288)
Posted 24 days ago by Scott Brown
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4)
Message boards :
Number crunching :
Badges IV
(Message 162287)
Posted 24 days ago by Scott Brown
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5)
Message boards :
Cullen/Woodall prime search :
Cullen Woodall Sieve Resumed
(Message 162188)
Posted 26 days ago by Scott Brown
My run times seem to have dropped by just under 10%. Has anyone noticed similar behaviour?
I am not complaining given that I am using series 10xx GPU's.
Yes. My experience is the same.
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6)
Message boards :
Aggie The Pew message board
(Message 162089)
Posted 28 days ago by Scott Brown
Gents,
Units are now available for download .... time for a new badge! :-)
Or to upgrade an old badge... :)
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7)
Message boards :
Aggie The Pew message board
(Message 162057)
Posted 29 days ago by Scott Brown
I hope everyone is doing well, life has been busy here lately. I'm working on the next SGS badge - only about 500,000 tasks to go! completing around 4k daily. These badges are getting huge! I have another month or so before the weather gets hot and I cut back for a few months.
If there is one project that makes my heart skip a few beats, it is SGS. It is murder on the CPU's and also increases the temps by a further 10d C. I will need more time to get my LLR badges all up to Sapphire but there is no question that SGS will be the last one to go the Sapphire route.
To add insult to injury, SGS has a relatively low credit rate and which makes the agony that much worse.
Good stuff on the 30+ million so far!
Indeed...getting that up to a double silver was agonizing! But it does have the potential benefit of some really rare twin (TP) or Sophie Germain (SG) badges. ;)
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8)
Message boards :
Aggie The Pew message board
(Message 161762)
Posted 43 days ago by Scott Brown
Rolling machines on now...
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9)
Message boards :
Aggie The Pew message board
(Message 161753)
Posted 44 days ago by Scott Brown
Will be a bit of a late start for me, but hopefully the lost 2 to 3 hours will not cost me to much in position.
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10)
Message boards :
Aggie The Pew message board
(Message 161663)
Posted 47 days ago by Scott Brown
Brag time
Congratulations!
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