Nicely done PrimeGrid - Record Woodall Prime

axn · 2007-08-09, 12:56

Lookie here

ValerieVonck · 2007-08-09, 13:56

congrats to Primegrid & the finder - w00t first post

rogue · 2007-08-09, 15:40

Wow! That makes three Woodalls in one year (actually less than 1 year), although this is the first Woodall found by PrimeGrid. Now if they could only find the next Cullen...

BTW, this thread should probably be moved to the Prime Cullen Prime project area.

Is there a page on PrimeGrid that gives the current search status for Cullens and/or Woodalls?

axn · 2007-08-09, 17:14

Quote:

Originally Posted by rogue

Is there a page on PrimeGrid that gives the current search status for Cullens and/or Woodalls?

Not quite what you are looking for, but here and here will give you /some/ stats.

The front page (first URL) top section shows "Available" tests. The second page shows rangewise split (3rd line from the top and last two lines at the bottom), though it is not obvious whether it is cullen, woodall or both

rogue · 2007-08-09, 17:31

Quote:

Originally Posted by axn1

The front page (first URL) top section shows "Available" tests. The second page shows rangewise split (3rd line from the top and last two lines at the bottom), though it is not obvious whether it is cullen, woodall or both

Exactly my point. Maybe I'm expecting too much, but I think that the stats for the Sierinski/Riesel base 5 project are easier to understand.

Rytis · 2007-08-09, 17:47

Thanks for the greetings :)

Currently we are not running any Cullen work. We hope to start with Cullens in the end of next week. I also have plans to improve statistics - the page was meant for TPS, and was only slightly adapted to show C/W, too. The limiting factor is time...

jasong · 2007-08-09, 21:39

251749 · 2^2013995-1

The above is the number listed on the page. I was confused at first, since a Woodall is supposed to be n*2^n-1, but then I got out my calculator and found the equivalent equation 2013992*2^2013992-1.

axn · 2007-09-03, 08:48

Another one found, as hinted here and reported here.

Currently undergoing verification, slotting in at #25 on Top 5000 list. The proper form is 2367906*2^2367906-1.

Will the next one be a megadigit prime?

2007-08-09, 12:56	#1
axn Jun 2003 2×2,719 Posts	Nicely done PrimeGrid - Record Woodall Prime Lookie here

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2007-08-09, 13:56	#2
ValerieVonck Mar 2004 Belgium 34F₁₆ Posts	congrats to Primegrid & the finder - w00t first post

2007-08-09, 15:40	#3
rogue "Mark" Apr 2003 Between here and the 2×3⁴×43 Posts	Wow! That makes three Woodalls in one year (actually less than 1 year), although this is the first Woodall found by PrimeGrid. Now if they could only find the next Cullen... BTW, this thread should probably be moved to the Prime Cullen Prime project area. Is there a page on PrimeGrid that gives the current search status for Cullens and/or Woodalls?

2007-08-09, 17:47	#6
Rytis Nov 2006 53₁₆ Posts	Thanks for the greetings :) Currently we are not running any Cullen work. We hope to start with Cullens in the end of next week. I also have plans to improve statistics - the page was meant for TPS, and was only slightly adapted to show C/W, too. The limiting factor is time...

2007-08-09, 21:39	#7
jasong "Jason Goatcher" Mar 2005 3×7×167 Posts	251749 · 2^2013995-1 The above is the number listed on the page. I was confused at first, since a Woodall is supposed to be n2^n-1, but then I got out my calculator and found the equivalent equation 20139922^2013992-1.

2007-09-03, 08:48	#8
axn Jun 2003 12476₈ Posts	Another one found, as hinted here and reported here. Currently undergoing verification, slotting in at #25 on Top 5000 list. The proper form is 2367906*2^2367906-1. Will the next one be a megadigit prime?