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>
| 661: | \[L_{661}\] | 6193571 × 584048382551059<15> × 382331657154918920473625551106818317498508052488401151898473656777576193806173613522460356616553264245910301801789409<117> |