Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 417: | \[{4^{417}-1\over3}\] | 3 × 7 × 441187 × 1694689 × 4506937 × 5625767248687<13> × 7606017793609<13> × 123876132205208335762278423601<30> × 51542639524661795300074174250365699<35> × 392856131525846647191238066992041449<36> × 551151871547616119938126402169604817<36> × 9121860314802631535729338714627536721870308627534265066967795115502591<70> |