Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 251: | \[{23^{251}-1\over22}\] | 503 × 27611 × 136658040094507<15> × 7409701345324516289038362847<28> × 505997887472522686398085865384227389329<39> × 92938615717877365170938515706390702348717<41> × [42739874612213696910572455464702678594849439888526077111200174738031091163904617030055532217042016493693069763430287167510255149669639648308808811245044630561735486206764349136966217355466741041275523897256261133<212>] |