Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 370: | \[{4^{370}-1\over3}\] | 52 × 11 × 31 × 41 × 149 × 223 × 593 × 1481 × 1777 × 25781083 × 28136651 × 29246281 × 184481113 × 231769777 × 567471221 × 616318177 × 1392776941 × 1587855697992791<16> × 4964166554103541<16> × 1258710725115650761<19> × 4299881834172078350686174001<28> × 7248808599285760001152755641<28> × 778429365397887608540618330873281<33> |