mersenneforum.org Number Abreviations
 Register FAQ Search Today's Posts Mark Forums Read

 2007-12-22, 14:38 #1 themaster     Dec 2007 2710 Posts Number Abreviations what do the abreviations 2000L and 2000M mean i understand what M2000 and P2000 are are there any other abreviations like this that i should know
 2007-12-22, 18:57 #2 retina Undefined     "The unspeakable one" Jun 2006 My evil lair 11·509 Posts I also don't know, maybe this link will help? Last fiddled with by retina on 2007-12-22 at 19:07
 2007-12-22, 19:00 #3 themaster     Dec 2007 110112 Posts what would i put into google
2007-12-22, 20:16   #4
mdettweiler
A Sunny Moo

Aug 2007
USA (GMT-5)

3×2,083 Posts

Quote:
 Originally Posted by retina I also don't know, maybe this link will help?

Quick (okay, maybe not so quick) answer to the OP's question: They are abbreviations for thousand, million, billion, etc.; K, M, G, T, P, etc. are abbreviations for "kilo-" "mega-" "giga-" "tera-" and "peta-", respectively, which are prefixes used in things like "gigabyte" (1 billion bytes, actually in the case of bytes it's a little more than a billion, but in all other cases "giga-" means just plain old 1,000,000,000, and etc.). For example, your computer's processor clock speed is probably measured in gigahertz--i.e. billions of hertz. (If you have an older processor it's probably measured in megahertz.)

These prefixes have been sort of generalized for use in prime searching--for example, when dealing with Mersenne, Riesel, and Proth numbers (2^n-1, k*2^n-1, and k*2^n+1 respectively), the "n" value is often referred to with one of the above abbreviations--a common example of this you might see would be "500k", referring to n=500,000; another common prefix for values of n is "M", so if you see 1M, it means n=1,000,000.

Another example of these prefixes is sieving, where the p value (the sieving depth) is often referred to in terms of G (1 billion), T (1 trillion), and P (what comes after trillion?).

A quick little reference:
K = 1,000
M = 1,000,000
G = 1,000,000,000
T = 1,000,000,000,000
P = 1,000,000,000,000,000

Hope this helps!

Last fiddled with by mdettweiler on 2007-12-22 at 20:18

 2007-12-22, 20:24 #5 themaster     Dec 2007 33 Posts i also asked what L means i saw it on the cunningham tables first and then on other posts
2007-12-22, 20:28   #6
retina
Undefined

"The unspeakable one"
Jun 2006
My evil lair

559910 Posts

Actually the page I linked to doesn't have any strong language at all, it is very tame, but perhaps the URL is ... um ... fun.

Quote:
 Originally Posted by Anonymous They are abbreviations for thousand, million, billion, etc ...
Really? So what is 2000L?

 2007-12-22, 20:32 #7 themaster     Dec 2007 33 Posts is it just 2000 then
2007-12-22, 21:18   #8
markr

"Mark"
Feb 2003
Sydney

23D16 Posts

Quote:
 Originally Posted by retina Actually the page I linked to doesn't have any strong language at all, it is very tame, but perhaps the URL is ... um ... fun.
The page raised a smile, but if the F word is not strong language, there's not much left that is.

Last fiddled with by markr on 2007-12-22 at 21:20

 2007-12-23, 00:59 #9 rogue     "Mark" Apr 2003 Between here and the 22·3·487 Posts Check out Chez-Leyland. What you are looking for are called Aurifeuillean factorizations.
 2007-12-23, 01:04 #10 Cruelty     May 2005 2×809 Posts
2007-12-23, 01:07   #11
mdettweiler
A Sunny Moo

Aug 2007
USA (GMT-5)

141518 Posts

Quote:
 Originally Posted by retina Actually the page I linked to doesn't have any strong language at all, it is very tame, but perhaps the URL is ... um ... fun. Really? So what is 2000L?
Actually, the bad language was in the title of the web page (the part that shows up in your browser's titlebar), as well as in the URL.

As for 2000L: Sorry, I have no idea what L is supposed to mean. I don't think it's similar to K, M, G, T, P, E, etc. (unless it's the next thing after E, which I doubt). It might be something completely different.

 Similar Threads Thread Thread Starter Forum Replies Last Post mickfrancis Math 16 2017-03-01 07:17 CRGreathouse Probability & Probabilistic Number Theory 15 2014-08-13 18:46 aketilander Operazione Doppi Mersennes 1 2012-11-09 21:16 henryzz Math 7 2012-05-23 01:13 literka Factoring 5 2012-01-30 12:28

All times are UTC. The time now is 13:36.

Wed Aug 5 13:36:07 UTC 2020 up 19 days, 9:22, 1 user, load averages: 1.50, 1.65, 1.77