Base 10 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 129: | \[{10^{129}-1\over9}\] | 3 × 37 × 173 × 1527791 × 210769832431<12> × 1963506722254397<16> × 2140992015395526641<19> × 407429732767505248479163<24> × 10490974994611747848197172839956039870723832569747<50> |