Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
199: | \[{15^{199}-1\over14}\] | 2389 × 408301209509933587<18> × 244282684709749918668570769151212009261<39> × 443844613294975245782616367013854346270725456095361174903<57> × 744238379717405478588912133054444239035596226224371350999936526974148321026753567963357456090676745999032254071309789<117> |