document.write( "Question 214394: what 2 prime numbers if multiplied equal 400-digit number? \n" ); document.write( "
Algebra.Com's Answer #161945 by Alan3354(69443)\"\" \"About 
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There are several combinations that could fit that.
\n" ); document.write( "2 200-digit primes, a 100 and a 300 digit #, etc.
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\n" ); document.write( "In some cases, 2 200-digit #s will give a 399 digit product.
\n" ); document.write( "EG, 23*29 = 667 (3 digits)
\n" ); document.write( "31*43 = 1333 (4 digits)
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\n" ); document.write( "If the product of the 2 MS digits is more than 10, the result will be 400 digits.
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