Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
183: | \[{15^{183}-1\over14}\] | 241 × 367 × 7321 × 357847115029<12> × 220692472927167836907173<24> × 66437728342254817921459404330630159646331<41> × 278429522753620716334558341344444154267663080224158427<54> × 12667874697616549213524097597673780931423143450023004589742095662963549880967<77> |