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>
| 649: | \[L_{649}\] | 199 × 709 × 6491 × 8969 × 336419 × 4250951 × 9612926590532995199777721978326976344671<40> × 38036569145405908738139098073840422114446621894608685476173261748283691<71> |