Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 157: | \[{31^{157}-1\over30}\] | 968063 × 10157984348646112172529341851199<32> × 8541835610596531596427297663871099<34> × 5372383863057311316757835923344597314388270902596512521<55> × 102857335892460877536703645970866083362627764484818776857665193662163423039431609242688545999931810872909019<108> |