Message boards : Cullen/Woodall prime search : New Cullen Prime

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rogue
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Message 14974 - Posted: 20 Apr 2009 | 23:12:57 UTC

It's about time that someone knocked my 3+ year old record off. What I find really interesting is that I found the largest known Woodall at the time at about the same time. Since then, 5 new Woodalls have been discovered. I am rather surprised that only one Cullen has been found in the same time period.

Now if we could just find that elusive GCW 13 Cullen or Woodall...

geoff
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Message 15016 - Posted: 22 Apr 2009 | 2:17:19 UTC - in response to Message 14974.

Congratulations Dennis and everyone else involved in this project, what a great find!

DoES
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Message 15136 - Posted: 26 Apr 2009 | 0:23:47 UTC - in response to Message 15016.

Yes -- congrats on an excellent prime number -- but I am a little curious as to why it shows as 6328548 x 2 ^ 6328548 + 1 in Prime Grid and when you look at Chris Caldwell's list it is 1582137 x 2 ^ 6328550 + 1 --- ??????

DoES
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rogue
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Message 15137 - Posted: 26 Apr 2009 | 0:31:43 UTC - in response to Message 15136.

Because 6328548 = 1582137 * 2^2. Since this is base 2, the Prime Pages will divide k by that base (if it can) and store the number that way.

DoES
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Message 15138 - Posted: 26 Apr 2009 | 3:36:32 UTC - in response to Message 15137.

Because 6328548 = 1582137 * 2^2. Since this is base 2, the Prime Pages will divide k by that base (if it can) and store the number that way.

Fair enough---( just curious)
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mfbabb2
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Message 39825 - Posted: 30 Aug 2011 | 22:36:42 UTC - in response to Message 39321.

Perhaps you meant "Because 6328548 = 1582137 * 4^2." ?

No, 2^2 is correct (=4).
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Message boards : Cullen/Woodall prime search : New Cullen Prime