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>
| 550: | \[L_{550}\] | 3 × 41 × 43 × 307 × 401 × 570601 × 20125601 × 72912401 × 59996854928656801<17> × 268246800620554143257373290552875877832369251433833738128853733342001<69> |