Report top-5000 primes here - Page 24

gd_barnes · 2012-04-17, 05:42

Quote:

Originally Posted by Puzzle-Peter

1983*366^271591-1 is prime! (696222 digits)
This removed 47% of all candidates from the sieve file. R366 is now a 2ker.

http://primes.utm.edu/primes/page.php?id=106340

Nice!

This is CRUS's 2nd largest prime behind Ian's S12 monstrosity.

Puzzle-Peter · 2012-04-24, 15:26

Just submitted another one: 126072*31^374323-1 (558257 digits)

http://primes.utm.edu/primes/page.php?id=106529

gd_barnes · 2012-04-24, 16:49

Congrats on another huge prime Peter!

MyDogBuster · 2012-05-04, 01:08

http://primes.utm.edu/primes/page.php?id=106781

106*405^120952+1 is prime

Conjecture proven - ck= 146

Results emailed

gd_barnes · 2012-10-16, 04:35

Unconnected recently found 2 nice top-5000 primes:

25*800^124713-1 is prime
26*800^162819+1 is prime

The Riesel prime dropped R800 to 1 k remaining.
The Sierp prime dropped S800 to 2 k's remaining.

Congrats Dmitri!

Lennart · 2012-11-18, 15:05

10107*6^559967+1 is Prime

Lennart

gd_barnes · 2012-11-18, 19:32

Quote:

Originally Posted by Lennart

10107*6^559967+1 is Prime

Lennart

Nice find Lennart! ...on the lowest k remaining for S6.

rogue · 2012-11-19, 12:37

11441*60^180105+1

MyDogBuster · 2012-11-23, 18:12

http://primes.utm.edu/primes/page.php?id=110141

32*26^318071+1 is prime

S26 now has 2k's left - continuing

gd_barnes · 2012-11-23, 19:12

Nice one Ian. It's always good to get a large prime on one of the lower bases.

MyDogBuster · 2012-11-24, 06:29

http://primes.utm.edu/primes/page.php?id=110142

26*941^127533+1 is prime

ck=158

Conjecture proven

2012-05-04, 01:08	#257
MyDogBuster May 2008 Wilmington, DE 2²·23·31 Posts	S405 http://primes.utm.edu/primes/page.php?id=106781 106405^120952+1 is prime Conjecture proven - ck= 146 Results emailed Last fiddled with by MyDogBuster on 2012-05-04 at 01:11*

2012-11-23, 18:12	#262
MyDogBuster May 2008 Wilmington, DE 2²×23×31 Posts	http://primes.utm.edu/primes/page.php?id=110141 3226^318071+1 is prime S26 now has 2k's left - continuing Last fiddled with by MyDogBuster on 2012-11-23 at 18:16*

2012-11-24, 06:29	#264
MyDogBuster May 2008 Wilmington, DE 2²×23×31 Posts	S941 http://primes.utm.edu/primes/page.php?id=110142 26941^127533+1 is prime ck=158 Conjecture proven Last fiddled with by MyDogBuster on 2012-11-24 at 06:31*

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2012-04-24, 15:26	#255
Puzzle-Peter Jun 2009 2²×3²×19 Posts	Just submitted another one: 126072*31^374323-1 (558257 digits) http://primes.utm.edu/primes/page.php?id=106529

2012-04-24, 16:49	#256
gd_barnes May 2007 Kansas; USA 101×103 Posts	Congrats on another huge prime Peter!

2012-10-16, 04:35	#258
gd_barnes May 2007 Kansas; USA 101·103 Posts	Unconnected recently found 2 nice top-5000 primes: 25800^124713-1 is prime 26800^162819+1 is prime The Riesel prime dropped R800 to 1 k remaining. The Sierp prime dropped S800 to 2 k's remaining. Congrats Dmitri!

2012-11-18, 15:05	#259
Lennart "Lennart" Jun 2007 2⁵·5·7 Posts	10107*6^559967+1 is Prime Lennart

2012-11-19, 12:37	#261
rogue "Mark" Apr 2003 Between here and the 1100011010000₂ Posts	11441*60^180105+1

2012-11-23, 19:12	#263
gd_barnes May 2007 Kansas; USA 101·103 Posts	Nice one Ian. It's always good to get a large prime on one of the lower bases.