Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 449: | \[{4^{449}-1\over3}\] | 194867 × 1256303 × 4332851 × 6871197486841<13> × 3578620616468306981503<22> × 179293953141823358107657<24> × 526385733768051189441947168504909159<36> × 89396693392545895668303801721053258296972567022618106513441<59> × 3200877854760201765189686240178650665787305384308641898388890911033891323416400473331390370691357659<100> |