$x$ is an integer greater than $1$. Consider the following equation: $$(x+1)^2=x^2+p_1^2+p_2^2+\dots+p_n^2$$ where $$x=p_1^{a_1}p_2^{a_2}\dots{p_n^{a_n}}$$ Find all such numbers $x$ satisfying the above equation.

So far, $6$ is the only known solution for the problem (trial and error). Our efforts at "solving" the general case have been met with failure (if a proper solution is even possible). We have solved the special cases of $1$ and $2$ prime factors, however (confirming the above result).

The conjecture:

For the above question, $6$ is the only valid solution. Prove or disprove the statement.

  • 2
    $\begingroup$ That's an odd way to write it...wouldn't $2x+1=p_1^2+\cdots +p_n^2$ be easier to work with? $\endgroup$ – lulu Mar 7 '18 at 14:14
  • 1
    $\begingroup$ Uh, yeah, but I thought stating the question as originally posed would be better. $\endgroup$ – Mainak Roy Mar 7 '18 at 14:15

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