A cyclops prime is a cyclops number that is also a prime number. In base
10, its decimal expansion has an odd number
of digits and exactly one 0, in the central position. The
first few are 101, 103, 107, 109, 307, 401, 409, 503, 509, 601, 607, 701, 709, 809,
907, 11027, ... (OEIS A134809).
The largest cyclops prime with at most 101 decimal digits
is
In base 2, the only cyclops prime is 5, whose binary
expansion is 101 (Numberphile 2015).
