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>
| 647: | \[L_{647}\] | 12941 × 2163569 × 351689286725414854197297744826648716793077056110339<51> × 166611707593814409339307448570325003131364570778291461812611926027877088009<75> |