Saturday, October 1, 2016
Contact us    |    Advertise    |   Help   RSS icon Twitter icon Facebook icon
    Home  ·  News  ·  Forum  ·  Stories  ·  Image Gallery  ·  Columns  ·  Encyclopedia  ·  Videos
Find: in

New prime number is 22 million digits long


Posted on Wednesday, 20 January, 2016 | Comment icon 8 comments

The number is far too long to have any practical use. Image Credit: CC BY 2.0 Jeff Golden
A computer programme in the US has succeeded in finding the largest prime number ever discovered.
Prime numbers, which are a vital part of computer encryption, are special numbers that can only be divided by either themselves or by one. Common examples include two, three, five and seven.

For the last few years scientists have been running a computer programme at the University of Central Missouri in an effort to find new prime numbers larger than any that have come before.

Known as the Great Internet Mersenne Prime Search (Gimps), the project originally began in 2007 and has since discovered several new prime numbers with the last one being found in 2013.

Now however Dr Curtis Cooper has revealed the discovery of an entirely new prime number that is a staggering 22 million digits long and is written in mathematical notation as 2^74,207,281-1.

"The prime number, also known as M74207281, is calculated by multiplying together 74,207,281 twos then subtracting one," a Gimps spokesman said in a statement.

"It has 22,338,618 digits - almost 5 million digits longer than the previous record prime number."

Source: Independent | Comments (8)

Tags: Mathematics, Prime Number


 
Recent comments on this story
Comment icon #1 Posted by pallidin on 20 January, 2016, 20:26
What is the "purpose" of a "prime number"? I don't get it's significance. Encryption mathematical science? How?
Comment icon #2 Posted by JKoene on 21 January, 2016, 11:58
Well, good questions. I'll give you the answers, as soon as you find the next new prime number.
Comment icon #3 Posted by RabidMongoose on 21 January, 2016, 17:11
A computer in Missouri has discovered the largest known prime number, 274,207,281- 1. It is about 22 million digits long, 5 million digits longer than the previous largest known prime, which was discovered in January 2013. Prime numbers are numbers that are divisible only by themselves and one, such as 2, 3, 5, 7, 11 and 13. The search for the highest known prime is a long-established mathematical quest, of interest now more as a test of computing power rather than for any practical use of the number itself. It's a fun challenge too. http://www.theguardi...-million-digits Are tax payers happy ... [More]
Comment icon #4 Posted by badeskov on 21 January, 2016, 21:37
Are tax payers happy funding this? Are tax payers funding this? Probably. How big a percentage of the funding actually went to this endeavor? Probably a very little one. Did it further parallel computing? Yes, it did. All in all, as I see, looks like a win. A small amount of resources allocated to finding something that may be irrelevant, yet furthers parallel algorithms incidentally used in other areas I find rather useful and worth the money. Cheers, Badeskov
Comment icon #5 Posted by badeskov on 21 January, 2016, 21:42
What is the "purpose" of a "prime number"? I don't get it's significance. Encryption mathematical science? How? One part is encryption. Another is just the science. Cheers, Badeskov
Comment icon #6 Posted by stevemagegod on 22 January, 2016, 4:29
Interesting So has this software just been running non stop to find this prime number for the last 2 years straight? I find that hard to believe to have a computer constantly running massive amounts of numbers like this for over a year without having tech problems.
Comment icon #7 Posted by Silver Surfer on 24 January, 2016, 9:14
Comment icon #8 Posted by Silver Surfer on 24 January, 2016, 9:26
Interesting So has this software just been running non stop to find this prime number for the last 2 years straight? I find that hard to believe to have a computer constantly running massive amounts of numbers like this for over a year without having tech problems. Redundancy would have been the first thing they thought about. We are far past a 'single computer' failing.


Please Login or Register to post a comment.


  On the forums
Forum posts:
Forum topics:
Members:

5776631
261866
162723

 
 Spirituality, Religion and Beliefs
  why is there life
  If Jesus came in like a lion the first time
  Islam in Context
 Paranormal Books, Authors and Publications
  Pavel Kastl
  Hunger Games
  A Head Full of Ghosts
Do some people age faster than others ?
10-1-2016
A new study seems to have confirmed that some of us may simply be destined to die younger than our peers.
Gigantic dinosaur footprint found in Mongolia
10-1-2016
Palaeontologists have identified a prehistoric Titanosaur footprint that is the size of a human torso.
World's deepest underwater cave revealed
10-1-2016
Divers have discovered an underwater cave in the Czech Republic which descends to a depth of 1,325ft.
Rosetta is destroyed in comet crash-landing
9-30-2016
ESA's Rosetta spacecraft has gone out in a blaze of glory by deliberately colliding with comet 67P.
Featured book
 
By Guy Lyon Playfair
A look at the story of Peggy Hodgson and her four children who, between 1977 and 1979, were at the center of one of the most terrifying poltergeist cases ever documented.
Featured Videos
Gallery icon 
Elephant vs human swimming race
Posted 10-1-2016 | 1 comment
This bizarre race in India aimed to find out who swims faster, an elephant or a human being.
 
Fixed points
Posted 9-30-2016 | 0 comments
Michael explores the idea of fixed points in this new Vsauce video.
 
World's largest rock band
Posted 9-29-2016 | 3 comments
This Chinese rock band has 953 members including 349 singers and 154 guitarists.
 
 View: More videos
Stories & Experiences
Black magic
9-27-2016 | Mineral Wells, Texas
 
Crying mother
9-27-2016 | Centrol Mexico
 
Red-faced monster
9-14-2016 | Lox Florida
 
Locked door
9-14-2016 | Ho Chi Minh city/Vietnam
 
The visit
9-9-2016 | West Palm Beach, Fl
 
Translucent silent UFO
9-9-2016 | Brisbane/Australia
 
Sleep paralysis and strange activity
9-1-2016 | Tarpon Springs, FL
 
Blackout? Possession?
9-1-2016 | Canada
 
Golden ring eyes
8-29-2016 | USA
 
Shared grief experience
8-29-2016 | Scotland, UK
 

         More stories | Send us your story
 
Top   |  Home   |   Forum   |   News   |   Image Gallery   |  Columns   |   Encyclopedia   |   Videos   |   Polls
UM-X 10.7 Unexplained-Mysteries.com © 2001-2015
Privacy Policy and Disclaimer   |   Cookies   |   Advertise   |   Contact   |   Help/FAQ