1. Pi
This is what string math is for:
A team of Japanese researchers say they have calculated Pi to 1.24 trillion
digits.
The most accurate previous calculation only stretched to 206 billion places.
They
calculated the value for pi with a Hitachi supercomputer over 400 hours in
September. Kanada’s team spent five years designing the program used in the
September experiment, Kudo said. The Hitachi supercomputer is capable of 2
trillion calculations per second.
Kat
2. Re: Pi
This brings to mind at least two questions=2E=2E=2E
1) How do you prove that they are right=3F
2) Why bother anyway=3F With that sort of accuracy=2C we can measure the =
known universe with an error of less than a sub-atomic particle=2E That =
is definite overkill=2E I guess they had to spend that grant money =
somehow =3B-)
--------
cheers=2C
Derek
----- Original Message -----
From=3A Kat =3Ckat=40kogeijin=2Ecom=3E
Date=3A Tuesday=2C December 10=2C 2002 11=3A33 am
Subject=3A Pi
=3E =
=3E This is what string math is for=3A
=3E A team of Japanese researchers say they have calculated Pi to 1=2E24 =
=3E trillion digits=2E =
=3E The most accurate previous calculation only stretched to 206 =
=3E billion places=2E They =
=3E calculated the value for pi with a Hitachi supercomputer over 400 =
=3E hours in =
=3E September=2E Kanada=92s team spent five years designing the program =
=3E used in the =
=3E September experiment=2C Kudo said=2E The Hitachi supercomputer is =
=3E capable of 2 =
=3E trillion calculations per second=2E
=3E =
=3E Kat
=3E =
=3E =3D=3D=5E=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3E This email was sent to=3A ddparnell=40bigpond=2Ecom
=3E =
=3E http=3A//topica=2Ecom/u/=3Fb1dd66=2Eb2mL5y=2EZGRwYXJuOr send an email=
to=3A =
=3E EUforum-unsubscribe=40topica=2Ecom
=3E =
=3E =
=3E =
3. Re: Pi
On 10 Dec 2002, at 11:41, Derek Parnell wrote:
>
> This brings to mind at least two questions...
>
> 1) How do you prove that they are right?
>
> 2) Why bother anyway? With that sort of accuracy, we can measure the
> known universe with an error of less than a sub-atomic particle. That
> is definite overkill. I guess they had to spend that grant money
> somehow 
I don't know the cost of superputer time, but i think i recall a figure of
$10,000/hour being bandied about once. So 400 hours = $4Million. That's not
counting the 5 years of the superputer to develop the code, and the salaries
(at top university pay scales) of all those involved.
Sounds like it would have been easier and quicker, if less expensive, to use
Matt's bignum lib!
> --------
> cheers,
> Derek
>
> ----- Original Message -----
> From: Kat <kat at kogeijin.com>
> Date: Tuesday, December 10, 2002 11:33 am
> Subject: Pi
>
>
> > This is what string math is for:
> > A team of Japanese researchers say they have calculated Pi to 1.24
> > trillion digits.
> > The most accurate previous calculation only stretched to 206
> > billion places. They
> > calculated the value for pi with a Hitachi supercomputer over 400
> > hours in
> > September. Kanada’s team spent five years designing the program
> > used in the
> > September experiment, Kudo said. The Hitachi supercomputer is
> > capable of 2
> > trillion calculations per second.
> >
> > Kat
> >
> >
> > http://topica.com/u/?b1dd66.b2mL5y.ZGRwYXJuOr send an email to:
> > EUforum-unsubscribe at topica.com
> >
> >
> ==^^===============================================================
> This email was sent to: kat at kogeijin.com
>
>
>
4. Re: Pi
Why would some one need a number that long? a billion maybe. A trillion...
Was it to show off the supercomputer or the actual program?
jordah
----- Original Message -----
From: "Kat" <kat at kogeijin.com>
To: "EUforum" <EUforum at topica.com>
Subject: Pi
>
> This is what string math is for:
> A team of Japanese researchers say they have calculated Pi to 1.24
trillion digits.
> The most accurate previous calculation only stretched to 206 billion
places. They
> calculated the value for pi with a Hitachi supercomputer over 400 hours in
> September. Kanada's team spent five years designing the program used in
the
> September experiment, Kudo said. The Hitachi supercomputer is capable of 2
> trillion calculations per second.
>
> Kat
>
>
>
>
5. Re: Pi
- Posted by xanax at bellsouth.net
Dec 10, 2002
This sounds like the prime-number venture.
actually paying people to find primes above
what has already been found but with todays
computers, it'd take years just to match what
they already have.
Xanax
----- Original Message -----
From: <jordah at btopenworld.com>
To: "EUforum" <EUforum at topica.com>
Subject: Re: Pi
:
: Why would some one need a number that long? a billion maybe. A
trillion...
:
: Was it to show off the supercomputer or the actual program?
:
: jordah
: ----- Original Message -----
: From: "Kat" <kat at kogeijin.com>
: To: "EUforum" <EUforum at topica.com>
: Sent: Tuesday, December 10, 2002 12:33 AM
: Subject: Pi
:
:
: >
: > This is what string math is for:
: > A team of Japanese researchers say they have calculated Pi to 1.24
: trillion digits.
: > The most accurate previous calculation only stretched to 206 billion
: places. They
: > calculated the value for pi with a Hitachi supercomputer over 400
hours in
: > September. Kanada's team spent five years designing the program used
in
: the
: > September experiment, Kudo said. The Hitachi supercomputer is capable
of 2
: > trillion calculations per second.
: >
: > Kat
: >
: >
: >
: >
:
:
:
:
:
6. Re: Pi
- Posted by xanax at bellsouth.net
Dec 10, 2002
This sounds like the prime-number venture.
actually paying people to find primes above
what has already been found but with todays
computers, it'd take years just to match what
they already have.
Xanax
----- Original Message -----
From: <jordah at btopenworld.com>
To: "EUforum" <EUforum at topica.com>
Subject: Re: Pi
:
: Why would some one need a number that long? a billion maybe. A trillion...
:
: Was it to show off the supercomputer or the actual program?
:
: jordah
: ----- Original Message -----
: From: "Kat" <kat at kogeijin.com>
: To: "EUforum" <EUforum at topica.com>
: Sent: Tuesday, December 10, 2002 12:33 AM
: Subject: Pi
:
:
: >
: > This is what string math is for:
: > A team of Japanese researchers say they have calculated Pi to 1.24
: trillion digits.
: > The most accurate previous calculation only stretched to 206 billion
: places. They
: > calculated the value for pi with a Hitachi supercomputer over 400 hours in
: > September. Kanada's team spent five years designing the program used in
: the
: > September experiment, Kudo said. The Hitachi supercomputer is capable of 2
: > trillion calculations per second.
: >
: > Kat
: >
: >
: >
: >
:
:
:
:
:
7. Re: Pi
On 7 Dec 2002, at 13:02, jordah at btopenworld.com wrote:
>
> Why would some one need a number that long? a billion maybe. A
trillion...
>
> Was it to show off the supercomputer or the actual program?
I don't know. Possibly to test the computer, possibly to test the program.
It's
my understanding that in astronomy, in the million of calculations
involved in
travel away from earth, significant errors can creep in at rediculously
small
decimal point places, and if eliminated, can save fuel. But i don't know
at
which point it stops being significant versus a waste of cpu
horsepower/time.
Kat
> jordah
> ----- Original Message -----
> From: "Kat" <kat at kogeijin.com>
> To: "EUforum" <EUforum at topica.com>
> Sent: Tuesday, December 10, 2002 12:33 AM
> Subject: Pi
>
>
> > This is what string math is for:
> > A team of Japanese researchers say they have calculated Pi to 1.24
> trillion digits.
> > The most accurate previous calculation only stretched to 206 billion
> places. They
> > calculated the value for pi with a Hitachi supercomputer over 400
hours in
> > September. Kanada's team spent five years designing the program used
in
> the
> > September experiment, Kudo said. The Hitachi supercomputer is capable
of 2
> > trillion calculations per second.
> >
> > Kat
> >
> >
>
>
>
8. Re: Pi
On Mon, Dec 09, 2002 at 10:12:43PM -0600, Kat wrote:
> It's
> my understanding that in astronomy, in the million of calculations
> involved in
> travel away from earth, significant errors can creep in at rediculously
> small
> decimal point places, and if eliminated, can save fuel. But i don't know
> at
> which point it stops being significant versus a waste of cpu
> horsepower/time.
>
> Kat
I'm not sure if any one does. Hence the quest for on-going (perhaps one day
infinite??) accuracy.
jbrown
9. Re: Pi
It's not possible to have "infinite" accuracy, 'cause there could ALWAYS be
more digits, that's what infinite means.
Dan Moyer
----- Original Message -----
From: <jbrown1050 at hotpop.com>
To: "EUforum" <EUforum at topica.com>
Subject: Re: Pi
>
> On Mon, Dec 09, 2002 at 10:12:43PM -0600, Kat wrote:
> > It's
> > my understanding that in astronomy, in the million of calculations
> > involved in
> > travel away from earth, significant errors can creep in at rediculously
> > small
> > decimal point places, and if eliminated, can save fuel. But i don't know
> > at
> > which point it stops being significant versus a waste of cpu
> > horsepower/time.
> >
> > Kat
>
> I'm not sure if any one does. Hence the quest for on-going (perhaps one
day
> infinite??) accuracy.
>
> jbrown
>
>
>
>
