Lucas Sequence
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
561: | \[L_{561}\] | 22 × 199 × 919 × 1871 × 3469 × 3571 × 9901 × 23202961 × 579866431 × 73028376961<11> × 905674234408506526265097390431<30> × 11688413412416314248668966397959854437151<41> |