Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 138: | \[{15^{138}-1\over14}\] | 24 × 47 × 139 × 211 × 241 × 829 × 967 × 1381 × 6257 × 31741 × 81421 × 825287 × 434956681 × 3549551867 × 80732172121<11> × 3046462151831565769<19> × 153908199071740625749971976183<30> × 31096175767640183484106599269134482322375555399<47> |