Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 559: | \[{4^{559}-1\over3}\] | 431 × 2731 × 8191 × 9719 × 2099863 × 3180000071 × 326667346721<12> × 2932031007403<13> × 12553986510209<14> × 101119526079159121<18> × 16404229182321439707977<23> × 33715476283025803700130451<26> × 637467768535882654780280209<27> × 537267160555901894919756929016169673<36> × 9215285895065526291256518741915902569<37> × 893727031418219528215703263500245746111426327976710088873802347504988954469046303695621351442273545673249<105> |