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 gd_barnes 2008-06-14 19:16

[quote=Xentar;135735]Just saw this one in the log file:
160*17^166048+1 is a probable prime. Time: 4811.857 sec.

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

only 2 more for sierp b17[/quote]

A HUGE congrats on a HUGE prime Xentar!! :smile:

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

Gary

 Xentar 2008-06-30 16:45

WOOOHOO, birthday prime, found yesterday :)

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

only one more to go!

 gd_barnes 2008-06-30 19:50

[quote=Xentar;137014]WOOOHOO, birthday prime, found yesterday :)

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

only one more to go![/quote]

:george::george::george:

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

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

Gary

[QUOTE=Xentar;137014]WOOOHOO, birthday prime, found yesterday :)

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

only one more to go![/QUOTE]

Happy!

 KEP 2008-07-04 13:55

Congrats on the Base 17 Xentar, and to you too Gary on your 2 Base 256 primes...

KEP!

 michaf 2008-07-25 17:29

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.

 gd_barnes 2008-07-25 18:37

[quote=michaf;138345]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.[/quote]

Congrats on an excellent find Micha! :smile:

 gd_barnes 2008-11-13 10:58

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.

:smile: Gary

 kar_bon 2008-11-17 10:46

for the Liskovets-Gallot conjectures:

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

9 to go!

 kar_bon 2008-12-03 13:00

Liskovets-Gallot: Riesel odd

30003*2^613463-1 is prime!

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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