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>
| 615: | \[L_{615}\] | 22 × 11 × 31 × 1231 × 5741 × 1168501 × 4767481 × 28540921 × 370248451 × 7188487771<10> × 18058462711<11> × 2170732312961<13> × 111359800682371<15> × 115561959406981<15> × 139164676081021<15> × 1176149557721371<16> |