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>
| 1720: | \[L_{1720}\] | 47 × 1601 × 3041 × 9303823 × 118140342041947816243201<24> × 694215794893958272631562721<27> × 1403981099723321029379913948641<31> × 1269485331398883566721960085614767<34> × 108328298653440311496214373407081732577144493281<48> × 186238547254421451232202904924604047599215127508639285030173441<63> × 45801639035969842069700955030729315927910313537421618237941415283521231071229492467701072084060495676015891581914181572481<122> |