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>
| 721: | \[L_{721}\] | 29 × 619 × 1031 × 7211 × 12979 × 219868951 × 498643601 × 5257480026438961<16> × 84989226122714110273481971983088190996280049<44> × 56416861085073434292452983032377201016319982560035658161631<59> |