Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 416: | \[{4^{416}-1\over3}\] | 5 × 17 × 53 × 157 × 257 × 641 × 1613 × 2731 × 8191 × 65537 × 858001 × 928513 × 4940417 × 6700417 × 308761441 × 11342687617<11> × 18558466369<11> × 23877647873<11> × 21316654212673<14> × 715668470267111297<18> × 78919881726271091143763623681<29> × 703135063886107310322869668180880900631970395041438633085656587740154733922499375339477804972453889<99> |