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 2005-07-06, 23:45 #12 JHagerson     May 2005 Naperville, IL, USA 199 Posts New limits apply to factoring too? I guess that the answer is no, but do these new limits apply to initial factoring? I have an assignment where the PrimeNet report indicates factoring to 2^62, but my old PII is factoring to 2^67 (M30230527). I understand that deeper factoring does not cause problems but is it efficient? Thank you, Dr. Woltman, for your efforts.
2005-07-07, 00:21   #13
Mystwalker

Jul 2004
Potsdam, Germany

14778 Posts
These new limits ONLY apply to (trial) factoring

AFAI see it, everything seems to run as planned.
From the first posting:
Quote:
 #define FAC72 96830000L #define FAC71 75670000L #define FAC70 58520000L #define FAC69 47450000L #define FAC68 37800000L #define FAC67 29690000L #define FAC66 23390000L
Assuming those are lower boundaries, 67 bit trial factoring depth is the way to go.

Quote:
 For comparison, the old breakevens were: #define FAC72 71000000L #define FAC71 57020000L #define FAC70 44150000L #define FAC69 35200000L #define FAC68 28130000L #define FAC67 21590000L #define FAC66 17890000L
I quite sure that 68 bit would have been the old value.

2005-07-09, 05:42   #14

"Richard B. Woods"
Aug 2002
Wisconsin USA

22×3×641 Posts

Quote:
 Originally Posted by JHagerson I have an assignment where the PrimeNet report indicates factoring to 2^62, but my old PII is factoring to 2^67 (M30230527). I understand that deeper factoring does not cause problems but is it efficient?
That field ("62") of the Primenet report is showing how far (2^62) the number had been (unsuccessfully) trial-factored before it was assigned to you, not the limit to which you were to TF it during your assignment. After you report completion of TF to 2^67, the report will show "67".

In addition to the GIMPSters processing PrimeNet assignments, some people ("Lone Mersenne Hunters" -- a slightly misleading pun on "Lone Gunmen" from the X-Files TV series) have been systematically trying to TF all the numbers to lower bounds (typically 2^61 or 2^62) before PrimeNet hands them out as assignments. They had previously trial-factored M30230527 to 2^62 before PrimeNet assigned that number to you, so your assignment included finishing up the trial factoring (from 2^62 up to 2^67 in this case; under the pre-V24.12 limits it would have been from 2^62 up to 2^68).

Be assured that you are performing the correct (efficient) amount of TF; you are TFing to a shallower, not deeper, level than you would have under the pre-V24.12 limits.

Last fiddled with by cheesehead on 2005-07-09 at 05:55

 2005-07-09, 15:43 #15 JHagerson     May 2005 Naperville, IL, USA 199 Posts Thank you very much, Cheesehead. That explains quite a bit.
2006-07-08, 15:37   #16
JuanTutors

"Juan Tutors"
Mar 2004

571 Posts

Sorry, I need a quick translation of this table.
Quote:
 #define FAC72 96830000L #define FAC71 75670000L #define FAC70 58520000L #define FAC69 47450000L #define FAC68 37800000L #define FAC67 29690000L #define FAC66 23390000L
Does this mean, for example, that M30000000 would be factored up to 2^67 or 2^68?

 2006-07-08, 16:19 #17 ixfd64 Bemusing Prompter     "Danny" Dec 2002 California 2×29×43 Posts I can't wait! :o
 2006-07-09, 06:29 #18 RMAC9.5     Jun 2003 32×17 Posts 2^67 for all numbers less than 37800000.
 2006-07-10, 12:22 #19 garo     Aug 2002 Termonfeckin, IE 24×173 Posts 24.12 has been out for a year now so there is no need to wait.
 2006-07-10, 20:08 #20 ixfd64 Bemusing Prompter     "Danny" Dec 2002 California 2·29·43 Posts Ah, I got confused by a bumped thread. :\
2006-07-10, 21:24   #21
Mystwalker

Jul 2004
Potsdam, Germany

83110 Posts

Quote:
 Originally Posted by ixfd64 Ah, I got confused by a bumped thread. :\
At least you didn't get bumped by a confused thread.

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