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Old 2008-01-24, 20:12   #34
Jean Penné
 
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Default Unreserving k=19464

Quote:
Originally Posted by gd_barnes View Post
Karsten and Jean,

There are 3 more k's for Riesel base 2 ODD-n, base 4, and base 16 that I need to confirm statuses, reservations, and test limits. Here is what I show for k=13854, 16734, and 19464 and their coharts for Riesel base 2 odd-n k=6927 and 8367:

Riesel base 2 odd-n:
k=6927, test limit 261945; now unreserved
k=8367, test limit 262045; now unreserved

Riesel base 4:
k=13854, test limit 130972; now unreserved
k=16734; test limit 131022; now unreserved
k=19464; test limit ??; reserved by Jean

Riesel base 16:
k=13854, test limit 100000; now unreserved (I tested this one separately to n=100000 since we had a sieved file for it. Odd n's would still need testing separately up to n=200000 base 4)
k=16734, test limit 66511; now unreserved
k=19464, test limit ??; reserved by Jean


Can one or both of you verify that the above is correct?

My main question is for Jean:
What is your test limit on k=19464? There was an original post that stated n=93672 base 4. And then a later post that stated n=137000 base 2. Since the later post was a lower range, I've become confused.

Note that all of this is coming about since I'm now incorporating the base 2 even-n and odd-n conjectures into my web pages.


Thanks,
Gary
Gary,

I reserved k=19464 because I believed falsely it might be tested for Riesel odd n's (but 19463 is prime), so, I wish to unreserve it.
I tested it up to n = 262032 base 2, then I created a base 4 sieve file up to n=1048576 (1024K) base 4. I will make it available to users by attaching it here. It is sieved up to 49.58 billions.

Regards,
Jean
Attached Files
File Type: zip vk19464.zip (22.5 KB, 170 views)
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Old 2008-01-24, 20:45   #35
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Default Riesel odd n's : 3 new k's eliminated.

3 new primes found :

130383 104123 260766*2^104122-1 is prime! Time : 71.272 sec.
131727 169621 263454*2^169620-1 is prime! Time : 79.613 sec.
135567 68325 271134*2^68324-1 is prime! Time : 23.265 sec.

20 k's remaining now...

Also, for Sierpinski base 4 / odd n's, I completed the test of k = 9267 up to 2,000,000 base 2 (the very last n is 1999615), no prime... so, I am unreserving this k.

Jean
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Old 2008-01-25, 20:57   #36
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Default Riesel odd-n reservations

Karsten,

Part of a post from the reservations thread...

I'm reserving Riesel base 4 k=13854, 16734, and 19464 for further testing up to about n=250K base 4.

This also means I'll be reserving k=6927 and 8367 for the Riesel base 2 odd-n conjecture and taking them to n=500K base 2.


Gary
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Old 2008-01-28, 08:39   #37
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Default A big one drops for odd-n...

From the 'regular' primes thread:

Base 2 odd-n:
8367*2^313705-1

I'm still working on Base 2 odd-n k=6927. I'm currently at n=324K base 2.


Gary
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Old 2008-01-28, 16:46   #38
Jean Penné
 
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Default Gongrats, Gary! Two more prime for me for R. odd n

Very good news, Gary, and many congrats!

I also found two more primes in my range :

100377 231813 200754*2^231812-1 is prime! Time : 151.901 sec.
161583 138711 323166*2^138710-1 is prime! Time : 157.329 sec.

Also, I reached my 256K limit for :

k = 86613, n = 262111, no prime...
k = 163503, n = 262107, no prime...

So, I am unreserving these two k's for now.

After your last discovery, there are now 17 k's remaining, 6 of them I tested up to n <= 256K.
Regards,
Jean
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Old 2008-02-03, 09:32   #39
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Default Riesel base 2 odd-n status

k=6927 now at n=414K; no primes

testing to n=500K base 2 in conjunction with Riesel base 4 k=13854
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Old 2008-02-03, 10:25   #40
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Default Sierp base 2 odd-n status

k=37953, 53133, 60357, 70467, 80463, 84363, 85287 all at n=224K.

All going to n=600K or until a prime is found.
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Old 2008-02-06, 22:47   #41
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Default Riesel and Sierp odd-n statuses

Riesel base 2 odd-n k=6927 now at n=500K; no primes. I'll up my test limit to n=600K base 2 in conjunction with Riesel base 4 k=13854.


Sierp base 2 odd-n k=37953, 53133, 60357, 70467, 80463, 84363, & 85287 all at n=250K; no primes. Still going to n=600K on all.


Gary
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Old 2008-02-11, 20:42   #42
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Default Sierp odd-n prime and status

Sierp base 2 odd-n:
70467*2^268503+1 is prime

Sierp base 2 odd-n k=37953, 53133, 60357, 80463, 84363, & 85287 all now at n=286K.


Gary

Last fiddled with by gd_barnes on 2010-12-17 at 10:17
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Old 2008-02-14, 20:45   #43
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Default

Sierp base 2 odd-n:
37953*2^298913+1 is prime

Now down to 7 k's remaining.

Sierp base 2 odd-n k=53133, 60357, 80463, 84363, & 85287 are all now at n=305K; still going to n=600K.

Note: I have been double-checking k=9267 and 32247 along with this so I still have 7 k's in my sieved file. I'll double-check them to n=600K along with the rest. If I decide to continue higher than n=600K with the other k's, I'll drop the double-checking of the 2 k's at that point.


Gary

Last fiddled with by gd_barnes on 2010-12-17 at 10:17
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Old 2008-02-14, 20:51   #44
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Default Riesel base 2 odd-n status

Riesel base 2 odd-n k=6927 is now complete to n=600K and unreserved. No primes.

It had been tested in conjunction with base 4 k=13854.
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