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Old 2007-12-26, 03:46   #45
gd_barnes
 
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Cut-and-paste from tcadigan's prime find on Sierp base 16. Not moved here because it would be prior to first post.

Quote:
Originally Posted by tcadigan View Post
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
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Old 2007-12-26, 17:08   #46
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Default Sierp base 12 and Riesel base 13 update

Status from Carlos (em99010pepe):

404*12^n+1 is complete to n=79.6K.

He decided not to test 288*13^n-1 so that one is now available. It had already been tested to n=62K and a sieved file is available in the sieving thread up to n=100K.


Gary
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Old 2007-12-26, 19:51   #47
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32673*2^101924+1 is prime! Time: 51.669 sec.
or 32673*16^25481+1
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Old 2007-12-26, 20:45   #48
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Quote:
Originally Posted by tnerual View Post
32673*2^101924+1 is prime! Time: 51.669 sec.
or 32673*16^25481+1
Great; another down and 54 k's to go for Sierp base 16. That was a quick one; just above our prior testing limit of n=25K.

Are you searching any more k's right now? If so, I'll show them reserved by you to keep any double-work from happening. Also, if you want a file sieved to P=400G on any k that you're interested in for Sierp base 16, I can send it to you ~10-11 PM today CST US (4-5 AM Thurs. GMT) after our big sieve is done to that point.

Thanks for searching.


Gary

Last fiddled with by gd_barnes on 2007-12-26 at 20:50
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Old 2007-12-26, 21:10   #49
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Tnerual is reserving Sierp base 16 k=34543 for n=25K-100K.
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Old 2007-12-27, 20:02   #50
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Michaf has started and reserved Riesel base 31 and is continuing. There are currently 43 k's remaining at n=5K.
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Old 2007-12-27, 23:06   #51
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Reserving k=64518 for Sierp base 16 up to n=100K.

This is by far the highest weight k remaining. The file is 50% larger than any other. Getting rid of it will help speed up the big sieve.
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Old 2007-12-28, 02:57   #52
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Status report on k=2908 for Sierpinski Base 16:

Tested up to n=75810 as of this posting. I switched to Gary's provided sieve file today, since at p=400G it was sieved much deeper than my original sieving (about p=121G). Still no primes as of yet.

Last fiddled with by mdettweiler on 2007-12-28 at 02:58 Reason: fixed a typo
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Old 2007-12-28, 04:28   #53
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It didn't take long after reserving heavy-weight (relatively speaking) k=64518 for Sierp base 16.

64518*16^36998+1 is prime

53 k's remaining.

That removes 9726 testing candidates from the big sieve. Much better!
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Old 2007-12-29, 18:34   #54
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Sierpinski Base 16 k=2908 status report:

Now at n=83622. This is sort of a milestone because I am now in top-5000 territory, so if I find a prime, it will be reportable! Still hoping for a prime on this one before I reach n=100k and release it. It's very low weight (relatively speaking) but I'm still hoping I'll be able to knock it out.
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Old 2007-12-29, 19:45   #55
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Default Riesel base 16 started

I am reserving Riesel base 16 up to n=25K for all k's. I started on it Friday. There are 40 k's remaining at n=19K. I'll post what is remaining on Sunday after it has completed.

I've temporarily stopped the 'big' sieve on all k's for Sierp base 16 to n=200K at P=450G in order to do this.

What I think I'll do is sieve all of the Riesel base 16 k's to n=200K to P=400G and then post all of those sieved files. I'll then continue on the Sierp sieving.


Gary
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