Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 203: | \[{18^{203}-1\over17}\] | 449 × 80207 × 1505548068007783<16> × 15414623572633391<17> × 34287729886764649<17> × 98800490511312118297<20> × 28254435065806562749858639<26> × 999683789031940741556445143<27> × 3104954045496996685797001293567232231<37> × 156632241731235890185780547988704673143689657021319747220068893866314856020123838641431447<90> |