Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
146: | \[{15^{146}-1\over14}\] | 24 × 293 × 1607 × 9498574454554227751032485526115157395161031829822992999663487723815017273020611<79> × 5111329463430071646630167819950683399621676569261698373582346123709742512021745954241<85> |