Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 207: | \[{7^{207}-1\over6}\] | 32 × 19 × 37 × 47 × 139 × 1063 × 3083 × 402011881627<12> × 31479823396757<14> × 77569456660417<14> × 235169662395069356312233<24> × 227556220136287506028942276770826968937<39> × 201787294743721846314281442542420466149577013330276774094281<60> |