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>
| 431: | \[L_{431}\] | 188779 × 203357221762049<15> × 13780495531127210356018421<26> × 2239725692573574774225418974731846140272212489<46> |