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drummers-lowrise
1) Message boards : Sieving : GC sieving (for CPU) is now available for five bases (Message 94272)
Posted 1223 days ago by JohnProject donor
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".
2) Message boards : Sieving : GC sieving (for CPU) is now available for five bases (Message 94115)
Posted 1228 days ago by JohnProject donor
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.
3) Message boards : Sieving : GC sieving (for CPU) is now available for five bases (Message 94057)
Posted 1230 days ago by JohnProject donor
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.

4) Message boards : Project Staging Area : 2016 PRPNet April Challenge (Message 94016)
Posted 1231 days ago by JohnProject donor
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
5) Message boards : Project Staging Area : 2016 PRPNet April Challenge (Message 93994)
Posted 1232 days ago by JohnProject donor
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. :)
6) Message boards : General discussion : Space Exploration (Message 93989)
Posted 1232 days ago by JohnProject donor
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
7) Message boards : General discussion : Space Exploration (Message 93986)
Posted 1232 days ago by JohnProject donor
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
8) Message boards : Project Staging Area : 2016 PRPNet April Challenge (Message 93981)
Posted 1233 days ago by JohnProject donor
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.
9) Message boards : Project Staging Area : 2016 PRPNet April Challenge (Message 93980)
Posted 1233 days ago by JohnProject donor
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

10) Message boards : Project Staging Area : 2016 PRPNet April Challenge (Message 93979)
Posted 1233 days ago by JohnProject donor
Did I misspell something in a config file somewhere?

Oops, error on my part.


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