Re: Mersenne: Re: splitting up 10m digit primes

1999-10-19 Thread Brian J. Beesley
On 19 Oct 99, at 15:05, Ken Kriesel wrote: > Surely there are other programs. There must be various factoring efforts > running on non-Intel processors under non-Microsoft operating systems. Indeed there are. There are several factoring programs in the mers suite, also Ernst Mayer's Mfactor pr

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-19 Thread Ken Kriesel
At 07:49 AM 1999/10/19 +0100, Nick Craig-Wood <[EMAIL PROTECTED]> wrote: >On Tue, Oct 19, 1999 at 12:28:52AM -0500, Ken Kriesel wrote: >> How would you extend this concept to P-1, ECM, and factoring save files? > >As far as I'm aware prime95 is the only program to do P-1, ECM or >factoring so I wa

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-18 Thread Nick Craig-Wood
On Tue, Oct 19, 1999 at 12:28:52AM -0500, Ken Kriesel wrote: > How would you extend this concept to P-1, ECM, and factoring save files? As far as I'm aware prime95 is the only program to do P-1, ECM or factoring so I wasn't intending that the save files should include these. Maybe they should?

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-18 Thread Ken Kriesel
How would you extend this concept to P-1, ECM, and factoring save files? Would revisions to the standard format be handled within the 8-byte Ascii file identifier, or in a separate field? Ken At 08:22 AM 1999/10/17 +0100, Nick Craig-Wood <[EMAIL PROTECTED]> wrote: >Some time ago I proposed a st

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-17 Thread Nick Craig-Wood
On Sun, Oct 17, 1999 at 03:21:49PM +0100, Brian J. Beesley wrote: > On 17 Oct 99, at 8:22, Nick Craig-Wood wrote: > > I'd like to propose for discussion a simple cross-platform save file format > > as below. > > > > Width Value Description > > > > 8 "MersSave" in ASCII as

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-17 Thread Brian J. Beesley
On 17 Oct 99, at 8:22, Nick Craig-Wood wrote: > Some time ago I proposed a standard format for save files. It also > had the advantage that it only saved the actual bits used so would > make the save files 1MByte rather than 1.8 MByte for an 8,000,000 > exponent in prime95. Yes - this idea is u

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-16 Thread Nick Craig-Wood
On Sun, Oct 17, 1999 at 02:13:33AM +0200, Steinar H. Gunderson wrote: > On Sat, Oct 16, 1999 at 03:46:30PM +0100, Chris Jefferson wrote: > >However, proving that they has used the > >interim file generated by this particular program might be difficult... > > Not very. Save files are incompatible

Mersenne: Re: splitting up 10m digit primes

1999-10-16 Thread Steinar H. Gunderson
On Sat, Oct 16, 1999 at 03:46:30PM +0100, Chris Jefferson wrote: >However, proving that they has used the >interim file generated by this particular program might be difficult... Not very. Save files are incompatible from program to program. Or at least so I think... Converting a savefile is als

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-16 Thread Darxus
On Sat, 16 Oct 1999, Jukka Santala wrote: > Except that PrimeNet doesn't control the prize. This is the error everybody is doing. > EFF is adminstrating the competition and prize, given by anonymous donaters to The EFF is requiring full disclosure. So if somebody used the GIMPS client to find t

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-16 Thread Brian J. Beesley
On 16 Oct 99, at 7:35, Jukka Santala wrote: > [ ... snip ... ] > Except that PrimeNet doesn't control the prize. This is the error everybody is doing. > EFF is adminstrating the competition and prize, given by anonymous donaters to > advance distributed computing / mathemathical algorithms on com

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-16 Thread Chris Jefferson
On Sat, 16 Oct 1999, Jukka Santala wrote: > "Brian J. Beesley" wrote: > > > On 14 Oct 99, at 18:15, Chris Jefferson wrote: > > Surely this isn't really an issue. PrimeNet would surely recognise a > > result submitted by a "poacher" as such & either disqualify it > > automatically, or credit the

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-15 Thread Jukka Santala
"Brian J. Beesley" wrote: > On 14 Oct 99, at 18:15, Chris Jefferson wrote: > Surely this isn't really an issue. PrimeNet would surely recognise a > result submitted by a "poacher" as such & either disqualify it > automatically, or credit the actual owner of the assignment instead > of the "poache

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-15 Thread Lucas Wiman
> > Personally, I think the big problem with regards to this is not people > > quitting so much as the possibility of major hard-drive failure etc. on the > > testers. I doubt many of them keep good backups > > NO EXCUSE! A Zip drive or a CD-R is inexpensive and effective; one > will service ma

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-15 Thread Brian J. Beesley
On 14 Oct 99, at 18:37, Jukka Santala wrote: > Personally, I think the big problem with regards to this is not people > quitting so much as the possibility of major hard-drive failure etc. on the > testers. I doubt many of them keep good backups NO EXCUSE! A Zip drive or a CD-R is inexpensive a

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-15 Thread Brian J. Beesley
On 14 Oct 99, at 18:15, Chris Jefferson wrote: > > Also one would have to ask what would be the incencitive for someone to act > > as a backup server... or prevent them from "stealing the work" as it were, by > > using high-speed computers to finish the test a month before the main person > > doe

Mersenne: Re: splitting up 10m digit primes

1999-10-15 Thread Steinar H. Gunderson
On Thu, Oct 14, 1999 at 06:15:52PM +0100, Chris Jefferson wrote: >In my personal opinion, the best way of doing this would be to set up 3 >computers in a 'loop' all doing the same exponent. Then they could >communicate at regular intervals. We are already doing this manually, although only with 2

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-14 Thread Chris Jefferson
> Also one would have to ask what would be the incencitive for someone to act > as a backup server... or prevent them from "stealing the work" as it were, by > using high-speed computers to finish the test a month before the main person > does in hopes of getting the prize. I think that the new l

Re: Mersenne: Re: splitting up 10m digit primes

1999-10-14 Thread Jukka Santala
"Steinar H. Gunderson" wrote: > There are two problems with this approach. First, entropia.com will need > some HD space to hold these files (they are big...). Second, they will > also need bandwidth to receive all those big (and not very compressible) Personally, I think the big problem with re

Mersenne: Re: splitting up 10m digit primes

1999-10-12 Thread Steinar H. Gunderson
On Tue, Oct 12, 1999 at 04:15:11PM -0400, [EMAIL PROTECTED] wrote: >Well, as completion time gets longer and longer, it becomes more likely >that a user will give up in disgust. This could be after several months >of work is already complete. That's part the reason why searching for >10,000,000