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>
| 780: | \[L_{780}\] | 2 × 7 × 23 × 103 × 241 × 1249 × 2161 × 20641 × 28081 × 21183761 × 57089761 × 102193207 × 1932300241 × 2563566721 × 5836312049326721<16> × 94491842183551489<17> × 2551017286913735861521<22> × 950911219014256457284486265052714769135355521<45> |