Goldbach Conjecture
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enMaths in a minute: Number mysteries
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<p>Number theory is famous for problems that everyone can understand and that are easy to express, but that are fiendishly difficult to prove. Here are some of our favourites.</p>
<h3>The Goldbach conjecture</h3>
<p>The Goldbach conjecture is named after the mathematician <a href="http://www-history.mcs.st-and.ac.uk/Biographies/Goldbach.html">Christian Goldbach</a> who formulated it in the middle of the eighteenth century. It states that any even natural number greater than 2 can be written as the sum of two prime numbers. </p><p><a href="http://plus.maths.org/content/maths-minute-number-mysteries" target="_blank">read more</a></p>http://plus.maths.org/content/maths-minute-number-mysteries#commentsGoldbach ConjectureMersenne primeMersenne searchnumber theoryperfect numberTue, 16 Jul 2013 08:49:15 +0000mf3445925 at http://plus.maths.org/contentMathematical mysteries: Goldbach revisited
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<p>Since we first wrote about the Goldbach Conjecture we've had many requests for more information about it and about how our Goldbach calculator works. We answer some of your questions here but the Goldbach conjecture touches on a strange area of maths that may leave you even more curious than before...</p>
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<div class="pub_date">May 1998</div>
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<p>Since we first wrote about the Goldbach conjecture (see <a href="/issue2/xfile/index.html">Mathematical mysteries: the Goldbach conjecture</a>), we have had many requests for more information about it, and about how our Goldbach calculator works. We can answer some of your questions here but the Goldbach conjecture touches on a strange area of maths that may leave
you even more curious than before...</p><p><a href="http://plus.maths.org/content/mathematical-mysteries-goldbach-revisited" target="_blank">read more</a></p>http://plus.maths.org/content/mathematical-mysteries-goldbach-revisited#comments5Goldbach ConjectureMathematical mysteriesThu, 30 Apr 1998 23:00:00 +0000plusadmin4762 at http://plus.maths.org/contentMathematical mysteries: the Goldbach conjecture
http://plus.maths.org/content/mathematical-mysteries-goldbach-conjecture
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<p>Can every even number greater than 2 can be written as the sum of two primes? It's one of the trickiest questions in maths.</p>
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<div class="rightimage" style="width: 200px;"><img src="/issue42/features/wilson/Euler.jpg" alt="Leonhard Euler" width="200" height="233" />
<p>Leonard Euler (1707-1783) corresponded with Christian Goldbach about the conjecture now named after the latter. </p>
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<p>Here is one of the trickiest unanswered questions in mathematics:</p>
<p><em>Can every even whole number greater than 2 be written as the sum of two primes?</em></p>
<p>A prime is a whole number which is only divisible by 1 and itself. Let's try with a few examples:</p><p><a href="http://plus.maths.org/content/mathematical-mysteries-goldbach-conjecture" target="_blank">read more</a></p>http://plus.maths.org/content/mathematical-mysteries-goldbach-conjecture#comments2FP-belowGoldbach calculatorGoldbach ConjectureMathematical mysteriesprime numberWed, 30 Apr 1997 23:00:00 +0000plusadmin4756 at http://plus.maths.org/content