- Congratulations to Dmitry and PrimeGrid.

My daughter and tested to 70000 (using Phils factored sets) until we gave up a few months ago.> 155th overall. and 429,390 digits long

In 2001 when I found 21480!-1 (83727 digits) it entered at 70th.

How times change

cheers

Ken

--- In primenumbers@yahoogroups.com, Mark Rodenkirch <mgrogue@...> wrote:

>

> From http://www.primegrid.com/forum_thread.php?id=1336:

>

> A remarkable discovery was made yesterday in PrimeGrid's PRPNet.

> Dmitry Domanov found a World Record Factorial prime.

>

> 94550!-1 is prime and is 429,390 digits long. It enters Chris

> Caldwell's The Largest Known Primes Database ranked 1st for Factorial

> primes and 155th overall.

>

> This is only the 24th known Factorial prime...the 14th discovery in

> the last 29 years and the first in almost 8 years. Needless to say,

> this is a very rare find. It more than triples the size of the

> previous record of 34790!-1 (142891 digits).

>

> --Mark

>

> [Non-text portions of this message have been removed]

> - --- In primenumbers@yahoogroups.com,

Mark Rodenkirch <mgrogue@...> wrote:

> 94550!-1 is prime and is 429,390 digits long.

Wonderful work, by all concerned.

PrimeMogul is cautious and runs an old OpenPFGW

as a validator. He has marked the -tp proof of

http://primes.utm.edu/primes/page.php?id=95248

as "external", i.e. tedious to do at home.

But I expect that Chris's run will eventually

"internalize" the proof, after a week, or so,

rather than a PrimeGrid day.

David - --- In primenumbers@yahoogroups.com, "djbroadhurst" <d.broadhurst@...> wrote:
>

In deed!

>

>

> --- In primenumbers@yahoogroups.com,

> Mark Rodenkirch <mgrogue@> wrote:

>

> > 94550!-1 is prime and is 429,390 digits long.

>

> Wonderful work, by all concerned.

>

> PrimeMogul is cautious and runs an old OpenPFGW

> as a validator. He has marked the -tp proof of

> http://primes.utm.edu/primes/page.php?id=95248

> as "external", i.e. tedious to do at home.

> But I expect that Chris's run will eventually

> "internalize" the proof, after a week, or so,

> rather than a PrimeGrid day.

>

machine RedHat P4 P4

Command: /home/caldwell/client/TrialDiv/TrialDiv -q 1 94550 ! -1 2>&1

[Ellapsed time: 37239.758 seconds]

1+sqrt(94561)

Running N+1 test using discriminant 94561, base 2+sqrt(94561)

Calling Brillhart-Lehmer-Selfridge with factored part 33.53%

94550!-1 is prime! (309659.2942s+2.1227s)

[Elapsed time: 3.58 days]

ref: http://primes.utm.edu/primes/page.php?id=95248

Paul