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>
| 688: | \[L_{688}\] | 2207 × 25948609 × 1522726772197695752518498088300171807<37> × 6965592972972893121300616468566415923281726745297518609446134117707110173045414991126916323443167<97> |