20061103, 06:26  #1 
Dec 2003
Hopefully Near M48
2·3·293 Posts 
GIMPS Credit for Exponents Between 79.3 Million and 596 Million
Given that the LL tests for M100,000,007 are scheduled to finish next month, I am curious as to how GIMPS credit will be assigned for exponents from 79.3 million to 596 million.
It would nice if Mr. Woltman could reply here for everyone to see. Thanks Last fiddled with by jinydu on 20061103 at 06:27 
20061103, 14:15  #2 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
101·107 Posts 
Like other exponents being worked on by LMH'ers there is likely to be no credit.

20061103, 23:35  #3 
Dec 2003
Hopefully Near M48
2·3·293 Posts 
That would be unfortunate... Could Mr. Woltman confirm this please?

20061103, 23:50  #4 
Mar 2005
Internet; Ukraine, Kiev
11×37 Posts 
In 100MDPP I keep my private version of stats. But, as I'm the only active contributor, those stats are rather boring.

20061104, 02:12  #5 
"Richard B. Woods"
Aug 2002
Wisconsin USA
1E0C_{16} Posts 
IMO credit can and will be given eventually if the records of contributions have sufficient information, such as identities of contributors, along with the amounts of work accomplished in a form that can be converted to CPUyears.

20061104, 18:30  #6 
Dec 2003
Hopefully Near M48
2·3·293 Posts 
Care to speculate on a formula for how credit will be given?

20061104, 18:36  #7 
Mar 2005
Internet; Ukraine, Kiev
11·37 Posts 
jinydu, some time ago I was thinking about the problem. My solution was
http://mersenneforum.org/showpost.ph...&postcount=284 
20061106, 13:01  #8  
"Richard B. Woods"
Aug 2002
Wisconsin USA
7692_{10} Posts 
Quote:
(Exponent2) * (iteration time for the FFT length), where "iteration time" is in units of P90CPUyears, or (Exponent2) * (iteration time for the FFT length) / (number of seconds in a year), where "iteration time" is in seconds on a P90, For trial factoring: Quote:
Last fiddled with by cheesehead on 20061106 at 13:03 

20061106, 19:00  #9 
Mar 2005
Internet; Ukraine, Kiev
11×37 Posts 
But are CPU years comparable? For example, TF > 64bits with mfactor on 32bit 3.0 Ghz Pentium4 would be much slower than on Athlon64 1.8Ghz. But LL would be faster on P4 AFAIK.
Last fiddled with by gribozavr on 20061106 at 19:01 
20061106, 19:34  #10 
"Richard B. Woods"
Aug 2002
Wisconsin USA
2^{2}×3×641 Posts 
We already have that problem now; it doesn't start just at 79.3M.

20061107, 01:30  #11  
Dec 2003
Hopefully Near M48
2·3·293 Posts 
Quote:


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