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Old 2008-04-18, 17:26   #12
grobie
 
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reserving the following 7 Riesel Base 256 k's:
1695
2237
2715
2759
3039
3147
3155

I am not sure how far I will take them, but no more than 50k might be less, I am going to orientation for a new job soon out of town, so I don't want to commit to anything big.

Last fiddled with by grobie on 2008-04-18 at 18:23 Reason: Added k=1695
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Old 2008-04-20, 04:42   #13
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3155*256^27010-1 is prime
3155*2^216080-1 is prime!

Let me know if I need to do anything else with this.
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Old 2008-04-20, 07:08   #14
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Quote:
Originally Posted by grobie View Post
3155*256^27010-1 is prime
3155*2^216080-1 is prime!

Let me know if I need to do anything else with this.
Nope, nothing more to do. Karsten should automatically list it on his 2000 < k < 4000 page when he gets it updated.

Nice work! It's good to knock out some of the base 256 k's. There's a very large # of k's remaining for such a high base.


Gary
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Old 2008-04-30, 02:56   #15
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Quote:
Originally Posted by grobie View Post
3155*256^27010-1 is prime
3155*2^216080-1 is prime!

Let me know if I need to do anything else with this.
Here is another one for Riesel Base 256:
3039*2^281056-1 is prime!
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Old 2008-05-29, 02:00   #16
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Quote:
Originally Posted by grobie View Post
reserving the following 7 Riesel Base 256 k's:
1695
2237
2715
2759
3039
3147
3155
All k's completed to 50k 2 primes already reported, no additional primes.
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Old 2008-06-27, 20:22   #17
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I'm reserving all remaining unreserved Riesel base 256 k-values (41 total k's). I'll take them from n=25K-75K (n=200K-600K base 2). This will be a double-check for the lower ranges on some of them.

Sieving has complete to P=1T, which is sufficient up to n=50K. Starting at only n=25K, I will initially will have only one high-speed core on it but will work up to having a full quad on it.

My goal is to have all powers-of-2 bases k-values up to n=600K base 2 by the end of Sept. Riesel and Sierp base 16 are close (n=560K base 2) and there are several even-n and odd-n conjectures k-values that are near n=400K that need to be pushed a little to accomplish this.

Edit: Although I am double-checking several k's that are already searched past n=75K, I won't show them as reserved since technically I'm not searching any new range on them. Anyone is free to reserve any k-value and test it above n=75K.


Gary

Last fiddled with by gd_barnes on 2008-06-27 at 20:27
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Old 2008-06-29, 19:09   #18
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5139*256^30740-1 is prime
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Old 2008-07-02, 08:43   #19
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2 primes from Riesel base 256:

5027*256^28873-1 is prime
4137*256^29273-1 is prime

44 k's to go and testing is complete to n=32.8K on two cores.


Gary
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Old 2008-07-04, 01:23   #20
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Riesel base 256 at n=33.5K; one prime reported for n=30K-35K; continuing.

Last fiddled with by gd_barnes on 2010-04-01 at 22:43 Reason: remove base <= 250
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Old 2008-07-08, 20:49   #21
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3855*256^36666-1 is prime

Riesel base 256 currently at n=37K with 43 k's remaining.
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Old 2008-07-10, 00:01   #22
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5247*256^36991-1 is prime

42 k's now remaining.
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