Base 9 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 640: | \[{9^{640}-1\over8}\] | 27 × 52 × 112 × 17 × 41 × 61 × 193 × 257 × 641 × 1181 × 7681 × 14401 × 15361 × 275201 × 8194721 × 21523361 × 42521761 × 700984481 × 128653413121<12> × 20613478723841<14> × 114113590517761<15> × 138424618868737<15> × 597747428754241<15> × 926510094425921<15> × 2369883922723415041<19> × 3913786281514524929<19> × 153849834853910661121<21> × 4151768361337614527605197761<28> × 1716841910146256242328924544641<31> × 2839798262237352133440978975949121<34> × 13076941325455482829912264905750890970035910385026138881<56> × 1838001766493490572787373478710920972139245644575383760144844508207951168302033615030318807139540281503414967681<112> × 265069956529917614550858335947015716058772714951789289584580807283895523893161445647913490202328699811170662864543094877313217558650951295155201<144> |