Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 164: | \[{31^{164}-1\over30}\] | 26 × 13 × 37 × 83 × 30341 × 2887427517866976061<19> × 7066933486329661873<19> × 42481797154433176612759<23> × 132259604354473376342663326676479453<36> × 61865491146216383674809135780235913078137<41> × 2322431112061021980104675872457081867878689361482939558747291940389392277191963579218883420952401<97> |