Message 10743 from Yahoo.Groups.Primeform
Return-Path: <paulunderwood@...>
X-Sender: paulunderwood@...
X-Apparently-To: primeform@yahoogroups.com
X-Received: (qmail 61156 invoked from network); 5 Nov 2010 05:02:20 -0000
X-Received: from unknown (66.196.94.105)
by m12.grp.re1.yahoo.com with QMQP; 5 Nov 2010 05:02:20 -0000
X-Received: from unknown (HELO n38b.bullet.mail.sp1.yahoo.com) (66.163.168.152)
by mta1.grp.re1.yahoo.com with SMTP; 5 Nov 2010 05:02:20 -0000
X-Received: from [69.147.65.147] by n38.bullet.mail.sp1.yahoo.com with NNFMP; 05 Nov 2010 05:02:19 -0000
X-Received: from [98.137.34.184] by t10.bullet.mail.sp1.yahoo.com with NNFMP; 05 Nov 2010 05:02:19 -0000
Date: Fri, 05 Nov 2010 05:02:19 -0000
To: primeform@yahoogroups.com
Message-ID: <ib034r+rsao@...>
In-Reply-To: <iavi16+34vv@...>
User-Agent: eGroups-EW/0.82
MIME-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: quoted-printable
X-Mailer: Yahoo Groups Message Poster
X-Yahoo-Newman-Property: groups-compose
X-Originating-IP: 66.163.168.152
X-Yahoo-Post-IP: 92.27.42.73
From: "paulunderwooduk" <paulunderwood@...>
Subject: Re: Near-repdigit
X-Yahoo-Group-Post: member; u=64538083; y=7DDIZQdrIwPM1vt_pS905sioqeOMTda7xNkRHMKtd6sqsnn-VVJOMyYW
X-Yahoo-Profile: paulunderwooduk

--- In primeform@yahoogroups.com, "djbroadhurst" <d.broadhurst@...> wrote:
>
>
>
> --- In primeform@yahoogroups.com,
> "paulunderwooduk" <paulunderwood@> wrote:
>
> > congrats to David for finding a provable top5000 near-rep digit:
> > http://primes.utm.edu/primes/page.php?id=95451
>
> Here are two somewhat larger near-repdigit primes:
>
> Running N+1 test using discriminant 7, base 1+sqrt(7)
> Calling Brillhart-Lehmer-Selfridge with factored part 69.90%
> 10^212904-10^212903-1 is prime! (10540.0793s+0.0084s)
>
> Running N+1 test using discriminant 3, base 1+sqrt(3)
> Calling Brillhart-Lehmer-Selfridge with factored part 69.90%
> 10^211030/2-1 is prime! (10610.3199s+0.0156s)
>

Very good. Number 1 and number 2 in the current NRD prime table:
http://primes.utm.edu/top20/page.php?id=15

Also, congrats again to Darren Bedwell for beating his previous largest
NRD-palindrome record with the ‎125877 digits prime:
http://primes.utm.edu/primes/page.php?id=95802

Paul