2017^2017 = 2017^2016 × 2017
cautam cel mai apropiat patrat perfect de 2017:
44^2 = 1936
2017 - 1936 = 81 = 9^2
deci, 2017 = 9^2 + 44^2
2017^2016 = (2017^1008)^2
2017^2017 = (2017^1008)^2 × (9^2 + 44^2)=
= (2017^1008 × 9)^2 + (2017^1008 × 44)^2
(suma de doua patrate perfecte)