Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 305: | \[{19^{305}-1\over18}\] | 151 × 911 × 78691 × 84181 × 26561231 × 3974999731 × 103344315181390471<18> × 56065687629692436349945381294682921858769274981456436532996640647681369599401<77> × [104321126767982723968340961891365999015492386971032187204461841431900269031022644302819695230995556430249764495463476926293500376426338330919961735263016635050931756065081407633016561603512750319272049629863189448729554773236961375495362372684553189157737260819901<264>] |