Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 256: | \[{28^{256}-1\over27}\] | 5 × 17 × 29 × 97 × 157 × 257 × 9473 × 614657 × 836609 × 1750913 × 2012449 × 4338337 × 7734913 × 13430849 × 168542177 × 22223646961<11> × 2381648711681<13> × 2716827163186049<16> × 72183193582863809<17> × 33056264688182274910972033<26> × 1280408985396537454555438337<28> × 904868753742115966158700311208476476672349529421569<51> × 219820641517459062490215270252976809114106534904765499346780388700857466504365834940608364609850727428600399097462103735717099203568310887485953<144> |