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Old 2016-05-19, 01:58   #45
Batalov
 
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Quote:
Originally Posted by rogue View Post
Anyone know of a good place that I can host some web pages for free and not have to deal with ads?
You could make an additional page (or pages) at prothsearch.net, maybe?
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Old 2016-05-19, 03:57   #46
a1call
 
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Quote:
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Did you generate a list of primes for the bases? If so, I will likely need to offload the list elsewhere. Anyone know of a good place that I can host some web pages for free and not have to deal with ads?
If interested, I can provide you with a subdomain from one of my domains.
I have 19.lc registered.
Choose a subdomain as short as you would like and I will set it up.

Notes:

* I can not guarantee a delivery time
* I can not guarantee duration of service

So if interested please let me know and make sure you have backups.
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Old 2016-05-19, 12:46   #47
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Thanks for your suggestions. MIke (Xyzzy) has offered me space here at mersenneforum, which is the best of all worlds. I had considered prothsearch, but I don't own the domain and with Ray being gone and Wilfred getting older, I don't know how much longer that domain will be around. Also, most of the work is being done by PrimeGrid, so I have been considering locking users from making reservations.

Last fiddled with by rogue on 2016-05-19 at 12:47
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Old 2016-05-19, 13:37   #48
lalera
 
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hi,
here are the results for carol / kynea
b=66, n=1000 to 30000
(66^1751+1)^2-2
(66^1902-1)^2-2
(66^9832+1)^2-2
(66^28522+1)^2-2
b=68, n=1000 to 30000
(68^2272-1)^2-2
(68^2634-1)^2-2
(68^2960+1)^2-2
(68^3014+1)^2-2
(68^16522-1)^2-2
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Old 2016-05-19, 18:06   #49
wombatman
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For b=26, no new primes through n=50k. Continuing on to n=100k.
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Old 2016-05-19, 21:12   #50
Batalov
 
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For b=688, (688^10160+1)^2-2 is prime!

For b<=2000, only b=640 and b=1656 remain without known primes.
I reserve b=1656 to n<=20000 and release b=688 at n=11000.
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Old 2016-05-21, 18:28   #51
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Congrats Serge for finding the near square prime (178^87525 - 1)^2 - 2 with 393937 decimal digits!

Last fiddled with by paulunderwood on 2016-05-21 at 18:29
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Old 2016-05-21, 19:41   #52
rogue
 
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Quote:
Originally Posted by paulunderwood View Post
Congrats Serge for finding the near square prime (178^87525 - 1)^2 - 2 with 393937 decimal digits!
I was wondering. Chris Caldwell's page sent an automated e-mail for cksieve as a program and I wasn't the one to do it.

Thanks Serge and congrats.
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Old 2016-05-22, 01:05   #53
Batalov
 
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Sometime last week I've thought about attacking a recordable (Top5000) C-K prime.
I've sieved b=10, 20, 30, 40 far enough, but altogether they didn't have enough sub-1-hour candidates after sieve to warrant a success (After a certain size candidates start taking more than an hour each, and then quickly 1.5 then 2 hours.) So to bridge the path to certain success, I additionally sieved 102<=b<=202 (but not powers) to 1e11 -- for a small slice just above 389K decimal digits. Then for technical reasons I chose only 36 thickest bases and sieved them up to 2e12. Then I merged all files and sorted by size and started ~ a hundred PFGW instances. This morning a prime popped up for b=178.

I will test through the weekend, then stop, and will post all tested ranges explicitly; they can be added to control tables in square brackets as some Proth and Riesel tables on certain sites are recorded.
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Old 2016-05-23, 00:40   #54
Batalov
 
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Cool

And now, a Kynea prime for b=30, to make a nice pair.
(30157950 + 1)2 - 2 is prime
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Old 2016-05-23, 00:53   #55
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Congrats
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