document.write( "Question 460209: 23 is prime
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Algebra.Com's Answer #315654 by MathLover1(20850) $\"\"$ $\"About$

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Twenty-three $\"is\"$ the $\"ninth\"$ prime number, the $\"smallest\"$ $\"odd\"$ $\"prime\"$ that is $\"not\"$ a $\"twin\"$ $\"+prime\"$ (a twin prime is a prime number that differs from another prime number by two, like 11 and 13). \r
\n" ); document.write( "\n" ); document.write( "Twenty-three is also the $\"fifth\"$ $\"+factorial\"$ $\"+prime\"$ , the $\"third\"$ $\"Woodall\"$ prime (In number theory, a Woodall number (Wn) is any natural number of the form $\"Wn+=+n+%2A+2%5En+-1\"$ ) . \r
\n" ); document.write( "\n" ); document.write( "It is an $\"Eisenstein\"$ $\"+prime\"$ (an Eisenstein prime is an Eisenstein\r
\n" ); document.write( "\n" ); document.write( " integer that is irreducible) with $\"no\"$ $\"+imaginary\"$ part \r
\n" ); document.write( "\n" ); document.write( "and real part of the form $\"3n+-+1\"$ .\r
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