Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 302: | \[{4^{302}-1\over3}\] | 5 × 18121 × 55871 × 165799 × 2332951 × 18717738334417<14> × 4373689270176379261201<22> × 130530323901899210670077<24> × 7289088383388253664437433<25> × 50834050824100779677306460621499<32> × 2854495385411919762116496381035264358442074113<46> |