document.write( "Question 351150: I have read from the list that 103 421 is a prime number
\n" ); document.write( "Is there a simple way to find if a number is a prime number or a composite number?
\n" ); document.write( "I am very weak in maths.
\n" ); document.write( "Thank you for your attention.
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Algebra.Com's Answer #250978 by stanbon(75887)\"\" \"About 
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Is there a simple way to find if a number is a prime number or a composite number?
\n" ); document.write( "I am very weak in maths.
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\n" ); document.write( "Let's say you want to determine if 149 is a prime number.
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\n" ); document.write( "1st: Find the square root of 149:
\n" ); document.write( "sqrt(149) = 12.2...
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\n" ); document.write( "2nd: See if 149 is evenly divisible by any prime less than 12.2
\n" ); document.write( "149/2 = 74.5 no
\n" ); document.write( "149/3 = 47.666 no
\n" ); document.write( "149/5 = 29.8 no
\n" ); document.write( "149/7 = 21.2.. no
\n" ); document.write( "149/11 = 13.54.. no
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\n" ); document.write( "3rd: If none of these primes divides 149, 149 is a prime number.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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