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>
| 405: | \[L_{405}\] | 22 × 11 × 19 × 31 × 181 × 271 × 541 × 811 × 1621 × 3079 × 4861 × 5779 × 21871 × 33211 × 42391 × 119611 × 62650261 × 31603395781<11> × 7654861102843433881<19> |