20081026, 18:18  #1 
Just call me Henry
"David"
Sep 2007
Liverpool (GMT/BST)
2^{3}·7·107 Posts 
P1 and srfile
when would you want to use:
srfile p 2 what sort of project would need this 
20081028, 17:36  #2 
Just call me Henry
"David"
Sep 2007
Liverpool (GMT/BST)
1768_{16} Posts 
why has no one answered is it because i didnt explain my question properly or because people dont know an answer
i will restate my question why would a project need to be able to p1 factoring optimal for if a factor is found several primality tests will be saved when would this be necessary 
20081028, 17:52  #3  
A Sunny Moo
Aug 2007
USA (GMT5)
3·2,083 Posts 
Quote:
Hope this helps! Max 

20081028, 18:42  #4 
Just call me Henry
"David"
Sep 2007
Liverpool (GMT/BST)
2^{3}·7·107 Posts 
when would finding a factor save several primality tests

20081028, 19:01  #5 
A Sunny Moo
Aug 2007
USA (GMT5)
3·2,083 Posts 
Depends on whether or not the project plans to do doublechecking, and the status of their doublecheck effort. For example, say you have a number that's farther ahead in the sieve range and hasn't been tested at all yet. A factor for that number will save two tests. Likewise, a number that has been tested once but not doublechecked yet will have one test saved if a factor is found. And, of course, if the number has been both tested and doublechecked, then the factor saves zero tests.

20081028, 20:17  #6 
Jun 2003
5,387 Posts 
What has srfile got to do with P1 factoring?!

20081028, 20:23  #7 
A Sunny Moo
Aug 2007
USA (GMT5)
3×2,083 Posts 

20081104, 17:01  #8 
Jul 2003
Behind BB
781_{16} Posts 
P1 factoring will become useful for the Sierpinski/Riesel Base 5 project before we reach the end of our dat file.
The largest numbers in our dat file are of size 5^n, where n = 2,000,000. Sometime after our testing queues reach the n>1,000,000 mark, P1 factoring will become useful. Last fiddled with by masser on 20081104 at 17:02 
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