document.write( "Question 1207597: Find the greatest prime divisor of the value of the arithmetic series
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Algebra.Com's Answer #845560 by ikleyn(52946) $\"\"$ $\"About$

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document.write( "This sum, as for any arithmetic progression, is the product of the mean by the number of terms.\r\n" );
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document.write( "The mean is   =  = 70.\r\n" );
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document.write( "The number of terms is  135-4 = 131.\r\n" );
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document.write( "So, the sum is  70*131.\r\n" );
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document.write( "Decomposition of the sum to product of primes is  70*131 = 2*5*7*131.\r\n" );
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document.write( "The greatest prime divisor is 131.\r\n" );
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document.write( "ANSWER.  The greatest prime divisor is 131.\r\n" );
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