Numbers
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A real number consists of an optional sign and one or more decimal digits, with
an embedded period (decimal point), a trailing exponent, or both. The exponent,
if  present,  consists  of  the  letter  E or e followed by an optional sign and one or
more decimal digits. The number is interpreted as a real number and is converted
to  a  real  (floating-point)  object.  If  it  exceeds  the  implementation  limit  for  real
numbers, a limitcheck error occurs.

(PostScript LANGUAGE REFERENCE).

Смотря что там внутри было, вообще-то.