20071221, 07:17  #23 
Sep 2004
2·5·283 Posts 
When I free up some machines (7 cores, 1 already working) I'll put them on here to give you guys a little boost....

20071221, 08:33  #24  
May 2007
Kansas; USA
2^{3}×5×263 Posts 
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FYI, I've analyzed powers of 2 up to 256 now. The conjectures on base 64 are low at k=14 and k=51 and were easily proven. On base 128, they're low with both at k=44 but I wasn't able to quite prove them. Riesel had one k remaining at n=5K. Sierp had 4 k's remaining at n=40K (searched to n=5K and converted higher ones from base 2) but 3 of them cannot be proven for the same reason as k=4 on Sierp base 32. So no good for those. I think that base 256 may be the next power of 2 effort after bases 4 and 16. It has a Riesel conjecture of k=10364 and a Sierp conjecture of k=1221. Sierp's is a little low but Riesel may yield some k's to search very high. Ultimately I'll check it to base 1024 or possibly 4096 but I see no reason to go any higher. There may not be any that are good > base 256. Based on almost split poll results, I think it may make sense to simultaneously do some powers of 2 while continuing to fill in bases <= 32. Although there isn't a separate page for powers of 2 yet, I will add base 64 in just a little while and add base 128 later today (Friday) on the current pages. If you haven't voted on the direction of the effort yet, get your voice heard! It is the poll in this forum. It's not public so I have no idea how people vote. Gary 

20071221, 08:42  #25  
May 2007
Kansas; USA
24430_{8} Posts 
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I'll see if I can get some sieving going on for ~4550 of the base 16 k's this weekend as the beginning of a team effort. I want to save a few for individual efforts. I think he said it'd be ~2 weeks before the other cores free up. Gary 

20071221, 14:48  #26  
Sep 2004
UVic
106_{8} Posts 
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as for the thread closure...I'm fine either way. I'd just want to make sure that the files don't get lost along the way. I think there's relatively recent newpgen's for all k's and even 2 different dats attached throughout the thread (1 for original search, 1 for expanded search) 

20071221, 21:27  #27 
May 2007
Kansas; USA
2^{3}·5·263 Posts 
Releasing Sierp base 11 and Sierp base 23
I have completed testing the one k remaining on Sierp base 11 to n=100K and the two k's remaining on Sierp base 23 to n=60K. They are now released for testing.
Carlos, Willem, or whomever wants to test Sierp base 23 further, I'm attaching the remainder of my sieved file up to n=100K to this post. It's well sieved to P=600G. Gary 
20071221, 22:44  #28  
Jan 2006
Hungary
2^{2}·67 Posts 
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Laters, Willem. 

20071221, 23:57  #29  
May 2007
Kansas; USA
2^{3}×5×263 Posts 
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Very good. Got ya down. Maybe you'll find a top5000 prime when you return! n>=73.7K would do it for base 23. Note for everyone: As you probably well know, this is not an official primesearch project so any top5000 prime correctly reported should not include a project ID. Gary 

20071222, 07:33  #30 
Mar 2006
Columbus, OH
7·11 Posts 
I would like to reserve 706 for base 27 to at least n= 50k. I might continue working on it.
Steven 
20071223, 19:19  #31 
Sep 2004
UVic
2×5×7 Posts 
7773*2^199784+1 is prime! Time: 213.884 sec.
i.e. 7773*16^49946+1 60145 digits I'll try my 6663 to 100K next Last fiddled with by gd_barnes on 20100516 at 07:12 
20071224, 03:14  #32  
May 2007
Kansas; USA
24430_{8} Posts 
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Good find. Our first n > 25K for the effort! 56 k's to go base 16. Edit: I tried moving these into the new 'report primes here' thread that I just now created but it put them before the main post since they were written earlier. So I'll just leave them here. Please report all future primes in that thread...sorry that it wasn't created earlier. Gary Last fiddled with by gd_barnes on 20071224 at 03:53 

20071224, 15:44  #33 
Jan 2005
479 Posts 

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