Base 29 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 61: | \[{29^{61}-1\over28}\] | 1831 × 13751019673<11> × 28004534179193290272271310975007581<35> × 8144571489120745945831283398616719704167<40> |