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 2008-09-11, 15:19 #1 roger     Oct 2006 10416 Posts 577294575*2^n+1 Has this k been reserved by someone for the plus side? I found a couple proth primes on google relating to it, but no reservation status. I've been working on it for a while, and am coming up to n=250k now. I really hope this work hasn't already been done.
 2008-09-11, 23:44 #2 VBCurtis     "Curtis" Feb 2005 Riverside, CA 19·223 Posts The only place I know of coordinating proth prime searching is www.prothsearch.net. Mark only coordinates up to k=1200 as far as I can tell. If you find another location with organization info, please post it here. -Curtis
 2008-09-12, 00:04 #3 Kosmaj     Nov 2003 E2616 Posts g42 has been testing this K since 1999 and found many primes: Code: rank description digits who year comment ----- -------------------------------- ------- ---- ---- -------------- 1744 577294575*2^481273+1 144887 g42 2008 3706 577294575*2^372840+1 112245 g42 2006 9756 577294575*2^300263+1 90397 g42 2001 10390 577294575*2^279263+1 84076 g42 2001 11886 577294575*2^238106+1 71686 g42 2001 11922 577294575*2^237384+1 71469 g42 2001 11987 577294575*2^236432+1 71182 g42 2001 12661 577294575*2^223519+1 67295 g42 2001 13591 577294575*2^207060+1 62341 g42 2000 and another 10. Search the Top-5000 site for more.
 2008-09-12, 01:28 #4 roger     Oct 2006 22·5·13 Posts Yeah, I just found the top-5000 listing for g42, though it only showed the top two primes you listed. I really thought no one had been doing this, no one seemed to be doing larger k-values except Robert44444uk here. This has been my major proth prime search for quite a while, and I found 139 primes, along with the last 5 that Kosmaj listed. I assume g42 has all the lower primes as well? And there's no gaps?
 2008-09-12, 04:25 #5 VBCurtis     "Curtis" Feb 2005 Riverside, CA 19·223 Posts We have no reason to know, but if you found the exact primes he did, you should assume he is searching in order. We'd know more about him/her than "g42" if we had any contact, so we're just guessing. -Curtis
 2009-01-16, 22:34 #6 Happy5214     "Alexander" Nov 2008 The Alamo City 349 Posts g42 Actually, he has his e-mail posted on his bio page. It's jack at brennen dot net. You might want to try contacting him there. -Happy

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