71.0 - 72.0 M to 2^63

[tmorrow]

I'd like to bag this range to 2^63.

I decided to start factoring at the other end of the exponent spectrum to stay out of PrimeNet's way. The other plus is that the amount of work per exponent is less than in the lower ranges so I'll get through them quicker.

There are 24415 exponents in this range based on the nofactor.zip file in the Mersenne database dated April 23, 2007 (the latest).

According to the "All Available Ranges" sticky, this range is available. These exponents are all already TF'ed up to 2^62.

Please let me know if someone has already claimed this range so I can select another.

I'm getting through them at a rate of 28 minutes per exponent, that's roughly 52 exponents per day or 18771 exponents per year so I'm expecting to complete the range in 1.3 years. I hope this rate is not too slow.

I will report back to this thread periodically and to George Woltman every month or so until the batch is completed.

[tmorrow]

Over the coming months, the table below will show a growing report of my progress on this exponent range. Complements indicated by a dash.

--Date/Effort--   --Cleared Exponents Report--   --My Factorisation Report--
Date       Days   Done   Done'  Total    %Done   Factored  Factored'   %Rate
20070515      3   439    23976  24415     1.80   4         435          0.91

Revised ETA: 30/10/2007

[tmorrow]

The forum doesn't let me edit my posts so I've provided an offsite link to my website where I can periodically update the status page.

http://members.iinet.net.au/~tmorrow...lmh_status.txt

[sonjohan]

Originally Posted by tmorrow

Over the coming months, the table below will show a growing report of my progress on this exponent range. Complements indicated by a dash.

--Date/Effort--   --Cleared Exponents Report--   --My Factorisation Report--
Date       Days   Done   Done'  Total    %Done   Factored  Factored'   %Rate
20070515      3   439    23976  24415     1.80   4         435          0.91

Revised ETA: 30/10/2007

How do you make those reports?

[tmorrow]

Originally Posted by sonjohan

How do you make those reports?

I wrote a quick and dirty bash shell script using cygwin unix tools for windows (freely available). I've got the clients network connected so their prime95/sprime files are accessible by the program. The script loops through each client, reads the readme.txt and worktodo.ini files and generates a report from the data. The basic utilities used are grep, awk, sed. Surprisingly the most difficult part of the script is the date arithmetic as the bash shell doesn't have any canned date utilities that I know of. The final report is ftp'ed to my website and I use the windows scheduler to run it once an hour - it only takes a couple of seconds to run each time.

It's a low tech solution. Perl could be used but I don't know it that well.

The script still has a few wrinkles (i.e. bugs), so I'm still tweaking it. Once I iron out those wrinkles I'll make the script available if you like. That will be in a month or so I expect.

[tmorrow]

This range is complete! I've emailed results to George.

The final report can be found here, including the factors - http://members.iinet.net.au/~tmorrow.../lmh_final.txt

Alternatively you can examine the results.txt files for the 6 clients I had working on this project in the attached zip file - http://members.iinet.net.au/~tmorrow...mh/results.zip.