20081128, 10:47  #1 
Mar 2006
Germany
2^{3}·19^{2} Posts 
Constant n Search
Constant n Searches This thread is for collecting all Constant n Searches. The most popular kind of such search was/is n=333333 at PrimeGrid (also n=195000). Please everyone who has some ranges to report for constant n, post here. Post the primes found (not only Top5000) and the krange searched. The page can be found under the 'Data Section' at the bottom. Notes:  The kranges are mostly not for sure (like for P.Kenny's n's): i got those information only from the Top5000 pages.  The n's and kranges from L.Zhou are firsthand data.  All primes are listed in the 'normal' data pages when there exist a Top5000 link (or note). So post your kranges for any n and i'll include and reserve them. Last fiddled with by kar_bon on 20081211 at 11:31 
20081211, 17:16  #2 
Just call me Henry
"David"
Sep 2007
Cambridge (GMT/BST)
1011011101101_{2} Posts 
does anyone if there is such a thing as a low or high weight n

20081211, 17:22  #3 
A Sunny Moo
Aug 2007
USA (GMT5)
3·2,083 Posts 
Well, though I don't know whether it would officially be termed "high weight" or "low weight", I *have* noticed that when scrolling through the large "master sieve files" that we use over at NPLB, that some n definitely seem to have a lot more k's listed for them than othersi.e., they look "heavier". For example:
Code:
405 300001 427 300001 531 300001 541 300001 619 300001 769 300001 789 300001 895 300001 951 300001 407 300002 435 300002 437 300002 537 300002 551 300002 617 300002 633 300002 635 300002 665 300002 677 300002 857 300002 887 300002 987 300002 451 300003 459 300003 565 300003 585 300003 609 300003 613 300003 679 300003 709 300003 735 300003 781 300003 849 300003 913 300003 539 300004 549 300004 657 300004 825 300004 857 300004 885 300004 927 300004 939 300004 469 300005 511 300005 525 300005 547 300005 657 300005 697 300005 715 300005 799 300005 925 300005 937 300005 425 300006 437 300006 527 300006 537 300006 635 300006 725 300006 783 300006 821 300006 921 300006 945 300006 421 300007 465 300007 489 300007 559 300007 603 300007 619 300007 625 300007 645 300007 715 300007 741 300007 813 300007 919 300007 939 300007 951 300007 961 300007 975 300007 Edit: I've added colors to the table. This can be useful in helping the brain to "pick out" which ones look heavier and lighter weight more easily. Last fiddled with by mdettweiler on 20081211 at 17:25 
20081211, 18:03  #4 
Account Deleted
"Tim Sorbera"
Aug 2006
San Antonio, TX USA
17·251 Posts 
I'd be surprised if the apparent weight of n's is due to anything other than random chance giving some more than other (but I have noticed this apparent "weight" in my own NPLB work, especially when it unbalances my cores due to one file having more "high weight" n's than the other). Weighted k's, on the other hand, actually make some sense.

20090511, 10:58  #5 
Aug 2008
Good old Germany
10001101_{2} Posts 
Karsten, as you read in another thread, I´m doing a constant n search at n=666777, with k=21000M(1G), trying to find twinprime. Atm the sieving is at 110T.
kar_bon: reservation is online Last fiddled with by kar_bon on 20090511 at 11:20 
20090622, 23:00  #6 
Aug 2008
Good old Germany
3×47 Posts 
Karsten, sorry for the work you have with me. But please unreserve my reservation for n=666777. There is so much to do on other places.

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