Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 307: | \[{7^{307}-1\over6}\] | 8597 × 54647 × 173149 × 507779 × 112444717702509272860052958843113481801341459505639927072538788124212324095650827015680394261222686871470547325905386970513833108032542955481015792785991168960396137739907904426483295434004108249300506683305982558607966219362574534703315813<240> |