Fifth Prime!!!!! Merry Christmas!

[jjjjL]

Announcement is up on the homepage!

http://www.seventeenorbust.com/

Meet 54767•2^1337287+1 -- the 8th largest prime in the world :)

Looks like we pulled one more prime out just in time for Christmas!

:cheers:


Everyone have a happy and safe holiday. Peace.

-Louie

[dmbrubac]

All right!

12 or Bust. Maybe we can do one for each day of Christmas.

Maybe not.

[Chinasaur]

Go out to Team EBT and craco

Good work all...we're now down to Twelve or Bust!! :)

Merry Christmas and a happy New Year


:cheers:

[Alien88]

Wheee.. wonder how long until we find the 6th.

[Moogie]

Great job!

:thumbs:

[Frodo42]

Well in Denmark it's past christmas, but never mind.

:cheers:

This project is rocking

[Halon50]

Whee! :cheers:

And Happy Holidays everyone! :cheers:

[eatmadustch]

not so fast please, I want to find one too ;)
:cheers: :cheers: :cheers:

[Supp]

Great work! :|party|:

[craco]

:D Needless to say that I'm very happy with this Christmas present.. :D :|party|:

Who will be the next one?

Happy holidays everyone and keep up the good work here at SoB... :thumbs:

Greetzz,

[rsbriggs]

Hopefully the press release (hint hint - don't recall one for the third or fourth number) will hit just after the first of the year, and bring in even more people! Congratulation to everyone at SoB, er, make that ToB...

------------------------------------------
Life really DOES have a meaning:
http://sysopmind.com/tmol-faq/meaningoflife.html

Humanity DOES have a purpose:
http://singinst.org/

[shifted]

I want one! lol

[philmoore]

I'm not sure, but according to Chris Caldwell's database, the new discovery should be the 7th largest known prime, not the 8th largest. Also, congratulations on the discovery of the largest known Proth prime, as Sander pointed out on the primes list! (Technically, a Proth prime k*2^n+1 is one in which k < 2^n, as this condition is what allows such a number to be fairly easily proven prime.)

[Bellbox]

Unbelievable is all I can say. Think of how far this project has come in so short a time. Here's to EoB :thumbs:

[jjjjL]

i think philmoore is right, it's the 7th, not the 8th. :)

i corrected the website post already. thanks.

-Louie

[jwolfe]

It's official--Chris Caldwell posted a new prime list today, and the SB primes are on it. 54767•2^1337287+1 is indeed the 7th largest known prime.

[eatmadustch]

where is this list of primes? I'm doing a maths project on primes and it sure would be useful!
Thanks

[smh]

where is this list of primes? I'm doing a maths project on primes and it sure would be useful!

Follow the links on this (http://www.utm.edu/research/primes/lists/) site.

[rsbriggs]

Yay! We're official !!! Looking forward to the next one - we should be pushing towards the number 2 or three spot !!!!

:cool:

[eatmadustch]

the find the 2nd largest prime would mean that it would have to have more than 2'098'960 digits, and that means n would have to be more than 6972595 (ok, that's without calculating the k, but that has hardly any weight anyway). I'm afraid that's going to be a while yet! Don't forget, such a test would also take quite a long time, more than just the usual few days!

[Nuri]

As a very "rough" rule of thumb, I simply divide the N value that is tested by 3.322 to find the number of digits approximately. It seems to work quite nicely due to the nature of 2^n in the formula (value increases 1 digit for each 2^3.322~).

When I am not after exact number of digits, but looking for just an idea on what range I am crunching, I simply multiply N with three and drop the last digit (I find it easier to do, it doesn't matter for me to be a few percentages off unless it really turns out to be prime).


44131: 995972 / 3.322 => 299811 (real one is 299823 digits)
46157: 698207 / 3.322 => 210177 (real one is 210186 digits)
65567: 1013803 / 3.322 => 305179 (real one is 305190 digits)
69109: 1157446 / 3.322 => 348418 (real one is 348431 digits)
54767: 1337287 / 3.322 => 402555 (real one is 402569 digits)

For those interested in GIMPS, this works there as well. Forexample;

13466917 / 3.322 => 4053858 (real one is 4053946 digits)
or;
13.5 million * 3/10 => 4.05 million.

[Xyzzy]

I've been using this page to calculate digits...

http://www.mersenne.org/bench.htm

I wonder how accurate it is? Here is some of the code...


//Compute decimal digits
document.mersenne.digits.value = Math.floor (exp * 0.301029995664 + 1);

[smh]

The formula Nuri gave was approximately.

And 1/3.322=0.301023478 so thats pretty close.

[Nuri]

I see now that when mutiplying by 3 and dropping the last digit, I was simply ignoring the 0.001029995664 part of the multiplier (ie. 0.3 instead of 0.301029995664).

[Edwin]

Originally posted by craco
:D Needless to say that I'm very happy with this Christmas present.. :D :|party|:

Who will be the next one?

Happy holidays everyone and keep up the good work here at SoB... :thumbs:

Greetzz,

Heee, Craco....

Don't believe I've ever congratulated you on (y)our own board, but CONGRATS....


(I know I'm late :sleepy:

[Scarblac]

Originally posted by jwolfe
It's official--Chris Caldwell posted a new prime list today, and the SB primes are on it. 54767•2^1337287+1 is indeed the 7th largest known prime.
Grumble. Now it's the 8th... 1483076^65536+1 (404434 digits) was discovered in 2003 and took 6th place. At least our next one will be higher than that :smoking: