BOINC and e

[CompKronos]

well as a a project me and my math teacher and two other students are doing we will attempt to break a world record. What record you ask? well no less awesome then computing 200 billion digits of e (including the two). Yes in reality it seems to be a math spitting contest, but there are various things that can be learned along the way

but also with that is the method we are using to do it: clustered computing! {w00ts}. Mainly we will use a program called BOINC that is perfect for this sort of thing. This really is the main point of my post to hopefully get some people here to download and when i finally set up the project to download and maybe not just my schools computers could help calculate 1/1,000,000!
(factorial not exclamation mark.)

link for BOINC if you want to see anyway it is very neat and may helps some others as well http://boinc.berkeley.edu/

its open-source, and the website has all the documentation needed

[WaeV]

That sounds cool. I have a book with phi to 5 million digits or so.

[bcnipod]

well as a a project me and my math teacher and two other students are doing we will attempt to break a world record. What record you ask? well no less awesome then computing 200 billion digits of e (including the two). Yes in reality it seems to be a math spitting contest, but there are various things that can be learned along the way

but also with that is the method we are using to do it: clustered computing! {w00ts}. Mainly we will use a program called BOINC that is perfect for this sort of thing. This really is the main point of my post to hopefully get some people here to download and when i finally set up the project to download and maybe not just my schools computers could help calculate 1/1,000,000!
(factorial not exclamation mark.)

link for BOINC if you want to see anyway it is very neat and may helps some others as well http://boinc.berkeley.edu/

its open-source, and the website has all the documentation needed

I will help if you want. I use Boinc for SETI.

[RaVNzCRoFT]

200 billion digits of e, eh? Good luck.

[JacksonCougAr]

Thats just odd: any of you math geeks figured out about how long this will take?

[Cryticfarm]

Mmmm, last record it took a 3.0 dual core and 30 gigs of RAM, 6 days, 4 hours, 41 mins, 6.67 secs to compute 100 billion.

[ScottyGEE]

Thats just odd: any of you math geeks figured out about how long this will take?

because e to the 200 biollionth makes someone a geek, if they did it on their own you'd have a point. What does reverse engineering a game do to you then Jackson ;0

That'd be long...
Print a book on it. That, or copy paste it here and I'll be able to read it.


Also, is there absolutely no limit to its decimal places? While I've used e a fair bit, I'm just curious if you could actually run into say, only 101billion before it stops

[GametagAeonFlux]

Also, is there absolutely no limit to its decimal places? While I've used e a fair bit, I'm just curious if you could actually run into say, only 101billion before it stops

e is usually defined by the following equation:

e = limn->infinity (1 + 1/n)^n.

Found that through the wondrous interwebs...basically, it's infinite.

[ScottyGEE]

e to the 1 million digits in a text document is 1013 KB. so multiplying that by 2000 gives 1 978.51562 megabytes

Big text file

I might be wrong though.

[GametagAeonFlux]

e to the 1 million digits in a text document is 1013 KB. so multiplying that by 2000 gives 1 978.51562 megabytes

Big text file

I might be wrong though.

There's a 70,000,000 digit pi text file that's ~546mb...I think you may just be off a bit.

[Cryticfarm]

Oh yeah, the text file for 100 billion was 43 gigs.

[JacksonCougAr]

Thats just odd: any of you math geeks figured out about how long this will take?

because e to the 200 biollionth makes someone a geek, if they did it on their own you'd have a point. What does reverse engineering a game do to you then Jackson ;0

That'd be long...
Print a book on it. That, or copy paste it here and I'll be able to read it.


Also, is there absolutely no limit to its decimal places? While I've used e a fair bit, I'm just curious if you could actually run into say, only 101billion before it stops

Technically we're all geeks

[CompKronos]

to see how long it would take in theory if everything went as planned, my math teacher did 4 billion digits in 12 hours, but his processor was overclocked so there is probably a good bit of errors in the file, so if we kept a processed stock-clocked i am going to say it would take 14 hours for 4 billion accurate digits. So that means about 285714285.8 digits per hour (rounded) so times that by 200 billion thats takes about 5000000000000000000 hours or so (on one comp)

[GametagAeonFlux]

14 hours for 4 billion accurate digits[...]so times that by 200 billion thats takes about 5000000000000000000 hours or so (on one comp)

What? Wouldn't you just multiply that by 50 and get 700 hours?

Otherwise the timeframe you're talking is ~570,776,255,707,762.6 years (5000000000000000000/24 = 208333333333333333.33 days / 365 [granted that doesn't account for the extra day in a leap year] = ^).

[CompKronos]

yea i i knew i had something really wrong but i didn't have time to fix it because i was late for class

[bcnipod]

If you want any help with the project, I would be more than willing to help you out.

[RaVNzCRoFT]

Also, is there absolutely no limit to its decimal places? While I've used e a fair bit, I'm just curious if you could actually run into say, only 101billion before it stops

e = limn->infinity (1 + 1/n)^n.

Yeah, it's essentially the right end behavior of the graph f(x)=(1+1/n)^n. The number of digits is infinite, although the value of the number lies at around 2.718.

[WaeV]

to see how long it would take in theory if everything went as planned, my math teacher did 4 billion digits in 12 hours, but his processor was overclocked so there is probably a good bit of errors in the file, so if we kept a processed stock-clocked i am going to say it would take 14 hours for 4 billion accurate digits. So that means about 285714285.8 digits per hour (rounded) so times that by 200 billion thats takes about 5000000000000000000 hours or so (on one comp)

Overclocking causes errors?

[CompKronos]

yes in fact underclocked produces the most accurate results at slower speeds
_
btw somewhere around 699.9 hours so a little longer then the month of February with a leap year i.e. 29 days and about 2 hours

[GametagAeonFlux]

Overclocking causes errors?

If the processor was meant to run at that speed, they would have made it run at that speed. You are sacrificing stability for speed. Think of it like drawing a line on paper...most people have to slow down their drawing speed to get a (close to) perfect line.