Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
299: | \[{5^{299}-1\over4}\] | 599 × 8971 × 71761 × 1076401 × 305175781 × 332207361361<12> × 7752619982267966542535041531665354400879<40> × 4483622187767180916663396803931609479674368941155912707479<58> × 16780474190283346236492912310202415541658656215262750198722442398037888879<74> |