Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 235: | \[{4^{235}-1\over3}\] | 11 × 31 × 283 × 2351 × 4513 × 13264529 × 2391314881 × 72296287361<11> × 165768537521<12> × 328006342451<12> × 461797907949997211<18> × 235457374510092115086834691<27> × 73202300395158005845473537146974751<35> |