22.1.3.6 Printing Bit Vectors

A bit vector is printed as #* followed by the bits of the bit vector in order. If *print-array* is false, then the bit vector is printed in a format (using #<) that is concise but not readable. Only the active elements of the bit vector are printed.

For information on Lisp reader parsing of bit vectors, see Section 2.4.8.4 (Sharpsign Asterisk).