Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 555: | \[{18^{555}-1\over17}\] | 73 × 31 × 41 × 223 × 601 × 2711 × 56167 × 157991 × 558721 × 140077676551<12> × 6613356544591<13> × 2756670060171673<16> × 10375318069755905859690041706382489471961<41> × 9914674020585919507893529088584073241878059013967173977<55> × 38730085117125035112107708769154901750521615897400877652942713140687885342051386403743167128498300965642638172768310991039407167641473739445583036102643748792308300708601<170> × [34932554858687175890469560432035602832447449949875783831657065570671720062085986153161233039542295710237595081182736982552204279635249731354959806607534113063517591564515024597045951866062598622498157286355486723111294912787525201461473396155304423574417337325293045848213509006173452098660581379568235021330748106109461223073532021802316072152925029931765592951<362>] |