Base 16 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 260: | \[{16^{260}-1\over15}\] | 5 × 11 × 17 × 31 × 41 × 53 × 131 × 157 × 257 × 521 × 1613 × 2081 × 2731 × 8191 × 42641 × 51481 × 61681 × 409891 × 858001 × 5746001 × 7623851 × 34110701 × 308761441 × 2400573761 × 4278255361 × 19868746561<11> × 65427463921<11> × 108140989558681<15> × 145295143558111<15> × 3377549010888001<16> × 7580827241843270677601<22> × 173308343918874810521923841<27> × 78919881726271091143763623681<29> × 37363769421172422182780447669037406234152610941283248995871866881<65> |