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>
| 667: | \[L_{667}\] | 59 × 139 × 461 × 19489 × 46691 × 78255734286696261371<20> × 92182696430726587961107728514433521431396074686759498976939254872867431204994008537136309142033057481041<104> |