[list_indonesia] [ppiindia] Ada orang menemukan bilangan primer terpanjang
- From: rahardjo mustadjab <bapakjewel@xxxxxxxxx>
- To: apakabar@xxxxxxxxxxxxxxx, ppiindia@xxxxxxxxxxxxxxx, harisuwasono@xxxxxxxxx, Wisnu Sindhutrisno <sindhutrisno.w@xxxxxxxxxxx>, ade_963@xxxxxxxxx
- Date: Fri, 4 Mar 2005 06:56:18 +0000 (GMT)
** Mailing-List Indonesia Nasional Milis PPI-India www.ppi-india.da.ru **
Dokter Martin Nowak, seorang spesialis mata di Jerman,
menemukan bilangan primer lebih panjang daripada
bilangan primer panjang yang diketemukan orang
sebelumnya. Panjang bilangan itu adalah 7.8 juta
angka. Tentu saja dia menggunakan program khusus di
computernya.
Salam,
RM
--------------------------
German discovers longest prime number
Luke Harding in Berlin
Wednesday March 2, 2005
Guardian
A German eye specialist with a keen amateur interest
in mathematics has discovered the world's largest
prime number after a 50-day search using his personal
computer.
Dr Martin Nowak, who has his own practice in the south
German town of Michelfeld, stumbled upon the number
last week, breaking the previous record for a prime
number by half a million digits.
Prime numbers are divisible only by themselves and 1.
While the first prime numbers 2, 3, 5, and 7, are easy
to identify, Dr Nowak's monster prime number is more
than 7.8m digits long and is written as 2 to the
25,964,951st power minus 1.
The number belongs to a special class of rare prime
numbers known as Mersenne primes, named after a 17th
century French monk who first studied them 350 years
ago. So far only 42 have been found.
Yesterday Dr Nowak was reluctant to talk about his
discovery, made using a special programme on his
2.4GHz Pentium 4 computer. "He's busy. He has a full
afternoon seeing patients. He's doesn't want to
comment," a spokeswoman at Dr Nowak's clinic said.
The eye surgeon is one of thousands of volunteers
using software provided by the Great Internet Mersenne
Prime Search (Gimps), a project to discover the holy
grail of prime number research - a 10m-digit prime
number. It took experts five days to work out that Dr
Nowak's new number was indeed bigger than the previous
biggest prime, discovered last May by an American. His
number has 7,816,230 digits.
Guardian Unlimited © Guardian Newspapers Limited 2005
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