Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 141: | \[{8^{141}-1\over7}\] | 73 × 2351 × 4513 × 13264529 × 4375578271<10> × 646675035253258729<18> × 1617189999730415801728461273583<31> × 65822575300775658772854198368766558032903129506601623<53> |