Base 2 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 191: | \[2^{191}-1\] | 383 × 7068569257<10> × 39940132241<11> × 332584516519201<15> × 87274497124602996457<20> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 191: | \[2^{191}-1\] | 383 × 7068569257<10> × 39940132241<11> × 332584516519201<15> × 87274497124602996457<20> |