Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 97: | \[{4^{97}-1\over3}\] | 971 × 1553 × 11447 × 31817 × 1100876018364883721<19> × 13842607235828485645766393<26> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 97: | \[{4^{97}-1\over3}\] | 971 × 1553 × 11447 × 31817 × 1100876018364883721<19> × 13842607235828485645766393<26> |