Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 279: | \[{13^{279}-1\over12}\] | 32 × 61 × 311 × 1117 × 1303 × 1609669 × 52306921 × 6377362657<10> × 329920430037432121<18> × 109711631401199502223<21> × 8170509011431363408568150369<28> × 6953421404898804540031541059209313<34> × 18734293854288203003982548158661893682628363562645943055215844598861287116655217870830160573907202650118983289288834291111840006131934667226239109755040571685567592934851268649<176> |