mersenneforum.org

mersenneforum.org (https://www.mersenneforum.org/index.php)
-   Riesel Prime Search (https://www.mersenneforum.org/forumdisplay.php?f=59)
-   -   The First Megabit Drive (https://www.mersenneforum.org/showthread.php?t=14087)

Kosmaj 2011-07-15 09:57

1854-1856 complete, no primes.

LiquidNitrogen 2011-07-16 18:44

How deeply sieved and choice of exponents
 
I noticed instead of a large range of k values, the list I am crunching right now has a few small ks and a wide range of even exponents.

I am wondering how deeply this file was sieved, and what program can generate multiple exponents? I have only seen a fixed-exp-multiple-k prime siever.

Thanks in advance.

Kosmaj 2011-07-17 01:35

All exponents are not even, there are both even and odd ones. Please check again the results you already enclosed.
The sieving depth of test files is given in the first post: 70P = 7E16.

Regarding sieving software, almost all of them can generate multiple exponents: NewPGen (fixed k), srsieve, psieve. However, fixed-exp sieving is faster.

LiquidNitrogen 2011-07-17 12:15

[QUOTE=Kosmaj;266644]All exponents are not even, there are both even and odd ones.[/QUOTE]

Sorry, didn't mean to imply they were all even, just a "wide range of them" were. I've only sieved on odd powers with fixed exponents, so I was not used to seeing them.

[QUOTE=Kosmaj;266644]The sieving depth of test files is given in the first post: 70P = 7E16.[/QUOTE]

Wow! 70,000,000,000,000,000? Isn't that 70 Quadrillion? What does the P stand for?

[QUOTE=Kosmaj;266644]
Regarding sieving software, almost all of them can generate multiple exponents: NewPGen (fixed k), srsieve, psieve. However, fixed-exp sieving is faster.[/QUOTE]

I didn't know that about NewPGen, thanks. I'll check it out.

amphoria 2011-07-17 13:07

[QUOTE=LiquidNitrogen;266676]Wow! 70,000,000,000,000,000? Isn't that 70 Quadrillion? What does the P stand for?[/QUOTE]

It stands for Peta which is the SI unit for 1e15. So 1 Petabyte = 1000 Terabytes.

LiquidNitrogen 2011-07-17 23:04

[QUOTE=amphoria;266681]It stands for Peta which is the SI unit for 1e15. So 1 Petabyte = 1000 Terabytes.[/QUOTE]

Ahh, I see, thanks.

Syd 2011-07-18 13:52

taking 1896 to 1898

lsoule 2011-07-20 15:33

1866-1876 complete, no primes.
taking 1876-1886

AES 2011-07-20 20:24

1 Attachment(s)
1830-1832 complete. no primes.

Kosmaj 2011-07-22 05:54

Added more test files past 1900k.

TO NEW MEMBERS: Please kindly observe the following rule:
Make your reservations starting with the first available file at the top of the list in the first post of the thread.

Thanks!

Syd 2011-07-25 17:20

[QUOTE=Syd;266788]taking 1896 to 1898[/QUOTE]

done, no primes


All times are UTC. The time now is 21:22.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.