document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=253439>Question 253439</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1) if 2^n + 1 is a prime show that n is a power of 2.<BR>\n" );
document.write( "it indicates directly to fermat numbers but i can't connect this question with fermat numbers.<BR>\n" );
document.write( "2) a printer numbers all the pages of a book starting with 1 and uses 3189 digits in all.how many pages does the book have?<BR>\n" );
document.write( "i have asked 2 questions which is within the limit. please if u can , answer them.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #185735 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=185735\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> http://en.wikipedia.org/wiki/Fermat_number#Other_theorems_about_Fermat_numbers\r<BR>\n" );
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document.write( "The proof is there.\r<BR>\n" );
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document.write( "1-9=9<BR>\n" );
document.write( "10-99=2*90<BR>\n" );
document.write( "100-999=3*900<BR>\n" );
document.write( "2700<BR>\n" );
document.write( "180<BR>\n" );
document.write( "9<BR>\n" );
document.write( "2889<BR>\n" );
document.write( "3189-2889=300<BR>\n" );
document.write( "300/4=75<BR>\n" );
document.write( "1000+74=1074\r<BR>\n" );
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document.write( " </SPAN>\n" );
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