20160520, 19:38  #804  
"Mark"
Apr 2003
Between here and the
5953_{10} Posts 
Quote:


20160520, 19:53  #805 
Dec 2011
After milion nines:)
2^{2}×337 Posts 
I took first 1000 candidates and make sieve up to 10000000
There is nearly 890000 candidates left Since test at 50 K is about 2.6 second, average test will be lower ( lets say 1.8 second) First I got problem to make sr2sieve do work with such long K ( first is 13000014446*3^n1) If I overcome this problem that I could sieve much deeper and expect to remove at least 100000 candidates. So final number will be about 790000 candidates to left Even if I not found any , so if I test all them it will be done in 790000* 1.8 second= 1422000 seconds /3600/24/12 = is about 1.37 days to complete 
20160520, 20:11  #806  
Quasi Admin Thing
May 2005
1653_{8} Posts 
Quote:


20160520, 21:36  #807  
"Curtis"
Feb 2005
Riverside, CA
2·3·733 Posts 
Quote:
Now that you know 1000 k's takes not long at all, how about tackling a 1G range from 25k to 100k? You don't need your entire 12thread machine for it, just one core to sieve and then a core or two for LLR. Maybe a month per 1G range on a single core? As KEP observed, sr2sieve is limited to k's less than 2^32 (~4G), with squarefree part of k less than 2^31. This is why I have a region testing on BOINC from 1G to 2.147G; that's 2^31. 02.147G will sieve on sr2, higher regions must use srsieve (unless someone is willing to fish out the k's from 2^31 to 2^32 with squarefree parts below 2^31!!). 

20160521, 04:57  #808 
Jun 2009
670_{10} Posts 

20160521, 11:04  #809 
Quasi Admin Thing
May 2005
3×313 Posts 
I actually also thinks that Gary would prefer a 1G range reservation. A conjecture, big as R3, where all k's remaining cannot be run in a single sieve and reservation, it is preferable to run such a conjecture in a 1G range per core or computer (dependant on the choice of the user).

20160521, 11:05  #810 
Quasi Admin Thing
May 2005
1653_{8} Posts 

20160529, 06:39  #811 
Jun 2009
1010011110_{2} Posts 
I'm not used to the small stuff any more so let's start with a trial range.
Reserving k=21G to 22G, n=25K to 100K. 
20160602, 16:41  #812 
Jan 2006
Hungary
100001100_{2} Posts 
As a tribute to this massive effort, I'll take a reservation too.
Reserving k=22G to 23G, n=25K to 100K. Willem.  PS 40000093766*3^364141 40000132604*3^929561 40000249162*3^495001 40000263902*3^677231 40000612492*3^589701 40000802024*3^260711 40000857326*3^635621 40000857326*3^873191 40001001914*3^1951801 40001016038*3^1182091 40001123828*3^838241 
20160608, 15:07  #813 
Just call me Henry
"David"
Sep 2007
Cambridge (GMT/BST)
3^{2}·7^{2}·13 Posts 
Approximately what percent of ks are primed between 25k and 100k?

20160608, 18:50  #814 
Quasi Admin Thing
May 2005
3·313 Posts 

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