Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 61: | \[{19^{61}-1\over18}\] | 56065687629692436349945381294682921858769274981456436532996640647681369599401<77> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 61: | \[{19^{61}-1\over18}\] | 56065687629692436349945381294682921858769274981456436532996640647681369599401<77> |