Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 79: | \[{19^{79}-1\over18}\] | 10429 × 32233 × 1380763 × 12577647923565067982570531255067267090413921105116610018487966576192735681081030635731<86> |