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>
| 556: | \[L_{556}\] | 7 × 41143 × 42243409662449<14> × 116590239816783239939808689<27> × 110997404288165949555811153489845110957222910488403176792045424904031287<72> |