Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 251: | \[2^{251}-1\] | 503 × 54217 × 178230287214063289511<21> × 61676882198695257501367<23> × 12070396178249893039969681<26> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 251: | \[2^{251}-1\] | 503 × 54217 × 178230287214063289511<21> × 61676882198695257501367<23> × 12070396178249893039969681<26> |