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Old 2004-12-24, 16:16   #276
Kosmaj
 
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Nov 2003

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Default Recent Progress

I completed k=57, 61, 83, 85, and 87 to 400k. I found the following primes:
61*2^384287-1
87*2^353734-1
87*2^360829-1
87*2^382268-1

I'm continuing work on k=67, 85, and 87.
I'd like to reserve k=79 from 300k and k=71 from 417k.
I'm also working on k=7, 21, 55, and 77.

I'm releasing, for the time being, k=57, 61 and 83.
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Old 2004-12-24, 19:44   #277
Harvey563
 
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Apr 2004

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Default 219,221,223,227 to 210000

I checked k=219, 221, 223, & 227 from 200000 to 210000 with no primes found.
k=243 is checked to 230000 with no new primes.

Harvey563
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Old 2004-12-27, 22:22   #278
cyrix
 
Jul 2003
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Hi,

I'd like to work on k=105 a little bit further.

Cyrix
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Old 2004-12-28, 00:24   #279
JCS
 
Nov 2004
Canada

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Hi Cyrix,

I am nearly done checking 105 up to 500,000. With only 1600 n's remaining, there have been no new primes since n=280022. Fairness would dictate that I'm long overdue for another prime, but then we know that large primes are anything but fair. You're welcome to join me for the last few laps.

I have also completed k=255 from 260,000 to 320,000. There was only one new prime, for n=281366.

For a dense, low k candidate, you may want to look at k=69. It has 68 primes for n less than 200k, and 7 primes between 200k and 500k.

Jeffrey
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Old 2004-12-30, 15:59   #280
Kosmaj
 
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Nov 2003

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Cyrix
You can also consider k=75, it appears to be reasonably populated with primes and it's checked only to n=250k.

My last progress report in 2004:
k=7, [1.1 M]
k=21, [880k]
k=55, [350k]
k=77, 77*2^607920-1 is prime, continuously checked to 575k

I'd also like to cancel k=71 since it's already processed to more than 600k by a third party.
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Old 2005-01-04, 17:38   #281
Harvey563
 
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Apr 2004

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Default k=91, 200000 to 210000

I have checked k=91, from 200000 to 210000 & found no primes.
I am checking k=93, from 200000 to 210000. I plan to continue checking whatever k values seem to be unchecked from 200000 to 210000[on the 15k Riesel list.] Please let me know if you've already checked k=93, 95,97,99, 107, 111, ... from 200000 to 210000. Thanks.

Harvey563
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Old 2005-01-04, 19:14   #282
masser
 
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Default k=111, 123, 153, 159, 171, 183, 189, 219, 225

Hi Harvey,

I'm almost finished testing the following k values over the range n=200K-300K:

k=111, 123, 153, 159, 171, 183, 189, 219, 225

I'll list the results here in a week or so.

Best regards,
masser
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Old 2005-01-05, 02:55   #283
Kosmaj
 
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Nov 2003

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Harvey,
Check also the list of searched intervals compiled by Keller. Some people report only to him. While some others report to nobody...
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Old 2005-01-06, 18:08   #284
masser
 
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Default some results

Hi all,

Here are some results for several k values:

k=111: 217034, 279227, currently at n=300000
k=123: no new primes to report, currently at n=380000
k=153: no new primes to report, currently at n=300000
k=159: 293235, currently at n=300000
k=171: 259262, 269539, 290403, currently at n=300000
k=183: no new primes to report, currently at n=300000
k=189: 213856, 235068, 237968, 239891, 246356, 255372, currently at n=300000
k=219: no new primes to report, currently at n=300000
k=225: 206293, currently at n=300000

I will continue testing these 9 k-values up to n=400 or 500 K.

best regards,
masser
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Old 2005-01-08, 10:38   #285
Keller
 
May 2004

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I would like to reserve k=195 but cant tell how deep I will be able to test it ... I hope to get it to n=500k :)

Last fiddled with by Keller on 2005-01-08 at 10:38
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Old 2005-01-08, 13:08   #286
Keller
 
May 2004

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Yes, that's 195*2^311215-1 found by Shane. It will be nice if he can tell us what range did he checked. On our table currently the limit is 250k, and on Wilfrid Keller's list it's 267k.

Last fiddled with by Kosmaj on 2005-01-08 at 15:09
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