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• When making an generalized Woodall prime record history i noticed the prime 187·2^47877-1 in Chris Database. (http://primes.utm.edu/primes/page.php?id=13129)
Message 1 of 2 , Jun 2, 2005
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When making an generalized Woodall prime record history i noticed the
prime 187·2^47877-1 in Chris' Database.
(http://primes.utm.edu/primes/page.php?id=13129)

Either i am totally studip and i overlook something or that prime is
actually not a generalized woodall, though it has that comment. I
can't find out the base for it: 187·2^47877-1 = 23936*4^23935-1 is
pretty near, but no gw too.

The interessting is: That number was the largest prime marked gen
Woodall for one week from 27.March 2000 to 3.April 2000.

So, i am i right and that was not justified.

Thomas Wolter
• ... I get this often; folks sometimes even object that their own primes are not generalized Woodalls. I ll add a note to the top-20 page and maybe the
Message 1 of 2 , Jun 2, 2005
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On Thu, 2 Jun 2005, yummie_55555 wrote:
> When making an generalized Woodall prime record history i noticed the
> prime 187·2^47877-1 in Chris' Database.
> (http://primes.utm.edu/primes/page.php?id=13129)
>
> Either i am totally studip and i overlook something or that prime is
> actually not a generalized woodall, though it has that comment. I
> can't find out the base for it: 187·2^47877-1 = 23936*4^23935-1 is
> pretty near, but no gw too.

I get this often; folks sometimes even object that their own primes are
not generalized Woodalls. I'll add a note to the top-20 page and maybe
the glossary to help folks identify these.

In the example above the key is to note 187*2^5 divides 47877-5 (quotient
8), so the number could be written:

(187*2^5) * (2^8) ^ (187*2^5) - 1

I think you also created a false dichotomy above--you are not totally
stupid for missing this, I know I can't spot many of them without a
program! So that is why my system is automated as best I can make it.

Chris
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