Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 231: | \[{15^{231}-1\over14}\] | 7 × 43 × 67 × 241 × 463 × 2333 × 5237 × 8537 × 14323 × 1743463 × 62475406423<11> × 2817034275427<13> × 4969143820807<13> × 28095816025663<14> × 233231979450578549516941109533238047237736577451339331<54> × 101100107337532955367655269156856927023088105405154477831293152140164796132293541535775716542906566300134992535289221911289946820367862267<138> |