document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=238106>Question 238106</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how many 4 digit prime numbers are there? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #174976 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=174976\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Garamond\" size=\"+2\">\r<BR>\n" );
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document.write( "Here are two lists:\r<BR>\n" );
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document.write( "Prime numbers less than 1000:  http://www.factmonster.com/math/numbers/prime.html\r<BR>\n" );
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document.write( "Prime numbers less than 10000: http://aleph0.clarku.edu/~djoyce/numbers/primes.html\r<BR>\n" );
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document.write( "The answer to your question is the number of items in the second list minus the number of items in the first list.  Fortunately, both of these lists are arranged in rows and columns, so it should be fairly simple to count the number of elements in each.\r<BR>\n" );
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document.write( "Good luck.\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi} + 1 = 0\"><BR>\n" );
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