Lucas Sequence
Defined with \(L_0=2\), \(L_1=1\), and \(L_n=L_{n-1}+L_{n-2}\) when \(n\geq2\). Related to the Fibonacci sequence.
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 1397: | \[L_{1397}\] | 199 × 509 × 5081 × 19559 × 487681 × 13822681 × 19954241 × 18591404391295654344917858476030266274675995857742273569<56> × 358749411103286588128921044837671952971342876890315788275238171354391125411273641633082566812099118401989319401620589468961278338670391751798161393961173502740900021894729866560610180343639080950899816231<204> |