Lucas Sequence
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
531: | \[L_{531}\] | 22 × 19 × 709 × 8969 × 336419 × 10884439 × 105117617351706859<18> × 4076267098002249077839<22> × 1237680116686639634200808590987111107763179456730159<52> |