Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 490: | \[{18^{490}-1\over17}\] | 11 × 19 × 41 × 71 × 211 × 449 × 491 × 883 × 2711 × 9041 × 29009 × 80207 × 101921 × 117251 × 131321 × 170227 × 229321 × 1236761 × 3052211 × 4179001 × 4274201 × 32222107 × 1125073321 × 4476462481<10> × 6013395151<10> × 32401295018849<14> × 40744808590081<14> × 6872363864819671<16> × 86651455669280587<17> × 4164889456901862302881<22> × 139362986236635048339131<24> × 15944803462923633762605952120076033<35> × [3691449268333533351248207738243146815663308627034530166544530220038172822244564769671129901407065720094123238483016271278335345013306064331766577570092831056594057041<166>] × [462104855134734226673469138848645401096895302257301931328419132989249135946126161452506166121624937725903377024746415372799612070996010939674368653915002737045039271165957407414487352909451<189>] |