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>
| 440: | \[L_{440}\] | 47 × 1601 × 3041 × 21121 × 93058241 × 562418561 × 2820928659522677780723681<25> × 126221993874858671057034908285162682401<39> |