Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
130: | \[{5^{130}-1\over4}\] | 2 × 3 × 11 × 71 × 131 × 521 × 5227 × 18461 × 38923 × 305175781 × 15188886343541<14> × 1034150930241911<16> × 15199221608544481<17> × 20986207825565581<17> |