1)
Message boards :
Sieving :
GC sieving (for CPU) is now available for five bases
(Message 94272)
Posted 2600 days ago by John
So what motivates this "plus two" rule?
I sought out others who might know the answer and so far, the only response I've received is that there's nothing special about using n+2. A restriction was needed a that's what was used.
The Prime Pages states "...a few authors have defined..." I'm still in search of "a few authors".
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2)
Message boards :
Sieving :
GC sieving (for CPU) is now available for five bases
(Message 94115)
Posted 2606 days ago by John
Here is a dumb question: Why is the convention, n+2 > b? Why is this natural? Why not for example n > b or n-2 > b or something else?
From the Prime Pages: Generalized Cullen
The Generalized Cullen primes are the primes of the form n*b^n + 1 with n+2 > b. The reason for the restriction on the exponent n is simple, without some restriction every prime p would be a generalized Cullen because:
p = 1*(p-1)^1 + 1.
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3)
Message boards :
Sieving :
GC sieving (for CPU) is now available for five bases
(Message 94057)
Posted 2608 days ago by John
We've opened five bases for Generalized Cullen sieving. They are b=29, b=41, b=47, b=49 and b=53. We're sieving for n=1M-2M, as no prime was found for n < 1M.
Have y’all thought about GC bases 32, 75, 106, 115? They technically do not have GC primes: primes of the form n*b^n+1 with n+2 > b. Also, b=149 is still a primeless base for both GW and GC.
BTW, I was not able to access Daniel Hermle’s GC 101-200 info. Anyone able to access the link???
However, I did find it through archive.org.
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4)
Message boards :
Project Staging Area :
2016 PRPNet April Challenge
(Message 94016)
Posted 2609 days ago by John
The Final Participant List correcting for my error.
Participants
41878 gd_barnes mattozan Scott_Brown
[DPC]maarten1001 GDB mdettweiler SEARCHER
1998golfer geeknik Michael_Millerick serhjo
288larsson Grebuloner pabliedung Snow_Crash
Aillas Honza Paperboy surt91
ALI67 ich_eben* Paul_Underwood SysadmAtNbg
ardo Jean_Penne pons66 tera3@EAnewsplus
Bazooka_CZ JeppeSN Prime95 TroubledBunny
brinktastee JimB pschoefer unconnected
Buckey Joe_O puh32 Usucapio_Libertatis
Buckeye74 John Puzzle-Peter Van_Zimmerman
Cinclus Johnny_Rotten Rick_Reynolds vaughan
composite Ken_g6 Robert47 VBCurtis
Death Lumiukko Roger Williamd007
Gary_Craig Matesko rogue zunewantan
Others who participated in the tribute but did not get work back in time to count for the Challenge.
boinc3@cbit Kevonni Ruediger_Eckhard
Etienne_Guyot pb386 warddr
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5)
Message boards :
Project Staging Area :
2016 PRPNet April Challenge
(Message 93994)
Posted 2610 days ago by John
As a side note, we did discover that cllr V3.8.17 does not parse correctly the ABC format that the PRPNet client uses.
FYI, by we I mean Jean and Mark. I was only the messenger. :)
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6)
Message boards :
General discussion :
Space Exploration
(Message 93989)
Posted 2610 days ago by John
Success on all accounts...finally!!! :) I didn't want to see it topple off the drone ship again.
EDIT: You can watch landing here: https://t.co/2Q5qCaPq9P/s/hVNS
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7)
Message boards :
General discussion :
Space Exploration
(Message 93986)
Posted 2610 days ago by John
SpaceX’s Falcon 9 rocket will launch the Dragon spacecraft to ISS today 2016-04-08 at 20:43:00
T minus 1 hr
NASA TV currently has live coverage:
http://www.nasa.gov/multimedia/nasatv/
Youtube Live Stream
https://www.youtube.com/watch?v=7pUAydjne5M
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8)
Message boards :
Project Staging Area :
2016 PRPNet April Challenge
(Message 93981)
Posted 2610 days ago by John
As a side note, we did discover that cllr V3.8.17 does not parse correctly the ABC format that the PRPNet client uses.
ABC $a*$b^$c+1
ABC $a*$b^$c-1
The cllr version included in PG's PRPNet archives is V3.8.16 so unless you upgraded cllr yourself, you would not have experienced this. Jean will be correcting this issue.
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9)
Message boards :
Project Staging Area :
2016 PRPNet April Challenge
(Message 93980)
Posted 2610 days ago by John
Moving on from the Challenge...
Review the options below and choose what's best for you:
// stopoption= tells the client what to do when it is stopped with CTRL-C and there is
// work that has not been completed and returned to the server. Options 2, 5, and 6 will
// return all workunits. This will override stopasapoption. The accepted values are:
// 0 - prompt
// 2 - Return completed work units, abandon the rest, then shut down
// 3 - Return completed work units (keep the rest), then shut down
// 5 - Complete in-progress work units, abandon the rest, report them, then shut down
// 6 - Complete all work units, report them, then shut down
// 7 - Complete all work units then shut down (do not report completed work)
// 9 - Do nothing and shut down (presumes you will restart with startoption=9)
stopoption=3
// stopasapoption= tells the client that it needs to be shutdown automatically, i.e. without
// a CTRL-C. It is evaluated after each test is completed. It should be 0 upon startup.
// The accepted values are:
// 0 - Continue processing work units
// 2 - Return completed work units and abandon the rest
// 3 - Return completed work units (keep the rest)
// 6 - Complete all work units and return them
// 7 - Complete all work units then shut down (do not report completed work)
stopasapoption=0
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10)
Message boards :
Project Staging Area :
2016 PRPNet April Challenge
(Message 93979)
Posted 2610 days ago by John
Did I misspell something in a config file somewhere?
Oops, error on my part.
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