Lucas Sequence
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
661: | \[L_{661}\] | 6193571 × 584048382551059<15> × 382331657154918920473625551106818317498508052488401151898473656777576193806173613522460356616553264245910301801789409<117> |