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>
231: | \[L_{231}\] | 22 × 29 × 199 × 211 × 4621 × 9901 × 229769 × 9321929 × 19630381 × 201562805274601<15> |