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Old 2008-06-14, 19:16   #23
gd_barnes
 
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Quote:
Originally Posted by Xentar View Post
Just saw this one in the log file:
160*17^166048+1 is a probable prime. Time: 4811.857 sec.

Place 604 :)
http://primes.utm.edu/primes/page.php?id=85139

only 2 more for sierp b17
A HUGE congrats on a HUGE prime Xentar!!

It's great to see all the different-base primes making the top-5000.


Gary

Last fiddled with by gd_barnes on 2008-06-14 at 19:22
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Old 2008-06-30, 16:45   #24
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WOOOHOO, birthday prime, found yesterday :)

262*17^186768+1 is a probable prime. Time: 7393.195 sec.
http://primes.utm.edu/primes/page.php?id=85256

only one more to go!
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Old 2008-06-30, 19:50   #25
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Quote:
Originally Posted by Xentar View Post
WOOOHOO, birthday prime, found yesterday :)

262*17^186768+1 is a probable prime. Time: 7393.195 sec.
http://primes.utm.edu/primes/page.php?id=85256

only one more to go!



OH YEAH!! A harty congrats from all at CRUS! We'll have to call you the base 17 slayer!

That's remarkable to find two primes so close together for such a high base at such a high n-range!


Gary
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Old 2008-06-30, 21:08   #26
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Quote:
Originally Posted by Xentar View Post
WOOOHOO, birthday prime, found yesterday :)

262*17^186768+1 is a probable prime. Time: 7393.195 sec.
http://primes.utm.edu/primes/page.php?id=85256

only one more to go!
Happy!
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Old 2008-07-04, 13:55   #27
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Congrats on the Base 17 Xentar, and to you too Gary on your 2 Base 256 primes...

KEP!

Last fiddled with by gd_barnes on 2010-04-01 at 22:46 Reason: remove small prime
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Old 2008-07-25, 17:29   #28
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Finally, after more then 2 month waiting:

74924*31^81381-1 is prime!

(121374 digits, around nr. 2725 in the top5000)

This now leaves only 8 k's to go for riesel base 31.

Last fiddled with by michaf on 2008-07-25 at 17:33 Reason: top5000 entry
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Old 2008-07-25, 18:37   #29
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Quote:
Originally Posted by michaf View Post
Finally, after more then 2 month waiting:

74924*31^81381-1 is prime!

(121374 digits, around nr. 2725 in the top5000)

This now leaves only 8 k's to go for riesel base 31.

Congrats on an excellent find Micha!
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Old 2008-11-13, 10:58   #30
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After a very long dry spell for the 40 k's remaining on Riesel base 256, it finally scores its first top-5000 prime:

7179*256^66585-1 is prime

submitted as:
7179*2^532680-1

All k's on Riesel base 256 are at n=67K; still going to n=75K.


Gary

Last fiddled with by gd_barnes on 2008-11-13 at 11:00
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Old 2008-11-17, 10:46   #31
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for the Liskovets-Gallot conjectures:

Riesel odd n:
106377*2^475569-1 is prime

9 to go!
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Old 2008-12-03, 13:00   #32
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Default Liskovets-Gallot: Riesel odd

30003*2^613463-1 is prime!
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Old 2008-12-10, 07:15   #33
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Default prime riesel base 48

Bingo!

7127*48^78407-1 is prime with 131825 digits. It comes in at place 2505 in the top 5000 list. I still need 5 more primes to prove the conjecture for prime riesel conjecture for base 48, so chances are that proving it is out of reach for now.

Cheers, Willem.
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