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Old 2019-01-04, 19:54   #158
science_man_88
 
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Jul 2009
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Quote:
Originally Posted by enzocreti View Post
PG(541456) is probable prime

5*(5^2+4^2+1+4^2+5^2+6^2)=(5^3+4^3+1+4^3+5^3+6^3)!!!
2*4^3+1+6^3 = 10*4^2+5+5*6^2
or 2x^3+(x+2)^3 = (2x+2)x^2+x+(x+1)(x+2)^2
or 3x^3+6x^2+12x+8 = 3x^3+7x^2+9x+4
or x^2-3x-4=0
or (x-3)(x)=4
or x=4 or -1

not sure why it needs to relate to your probable prime ... okay messed up the math, the point still stands.

Last fiddled with by science_man_88 on 2019-01-04 at 19:57
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