Question Number 82514 by naka3546 last updated on 22/Feb/20
$${Find}\:\:\:{maximum}\:\:{of}\:\:{n}\:\:{such}\:\:{that}\:\: \\ $$$${n}^{\mathrm{2}} \:+\:{n}\:+\:\mathrm{1}\:\:{is}\:\:{factor}\:\:{of}\:\:\mathrm{19}{n}^{\mathrm{2019}} \:+\:\mathrm{1}\:. \\ $$
Commented by naka3546 last updated on 22/Feb/20
$${n}\:\:\in\:\:\mathbb{N} \\ $$