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#34 |
Aug 2006
10111010010012 Posts |
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#35 |
"Forget I exist"
Jul 2009
Dumbassville
100000110000002 Posts |
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#36 |
May 2010
Prime hunting commission.
24·3·5·7 Posts |
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#37 |
Aug 2006
3·1,987 Posts |
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#38 |
May 2010
Prime hunting commission.
32208 Posts |
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#39 |
Aug 2006
3×1,987 Posts |
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The antecedents, of course -- you could easily reverse them.
Last fiddled with by CRGreathouse on 2010-11-11 at 05:10 |
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#40 |
"Forget I exist"
Jul 2009
Dumbassville
20C016 Posts |
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could we add sumdigits(sumdigits(x)+sundigits(y)) = sumdigits(x*y) into the first theory ? I think it works can anyone help prove it ?.
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#41 |
Aug 2006
3×1,987 Posts |
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What are x and y? (Remember: when you're asking for help you need to be specific!)
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#42 |
"Forget I exist"
Jul 2009
Dumbassville
26·131 Posts |
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for example 2047 = 23*89
2+4+7=4 mod 9 2+3+8+9 = 4 mod 9 5+8 = 4 mod 9 so the sumdigits for each multiplier 2kp+1 summed together gives the same as the sumdigits for 2^p+1. |
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#43 |
Aug 2006
596110 Posts |
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So... what are x and y?
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#44 |
"Forget I exist"
Jul 2009
Dumbassville
26×131 Posts |
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