The two known examples with are
and
. This might suggest that these
are not beta numbers. However,
there are some very large values of m and p among the cases where
has been
determined. The (current) record is attained for
, which has
. Other notable values are
with
, and
with
.
A sample of these numerical results is presented in two tables organized as follows. In
Table 1 of the Supplement all quintuples with
are listed, provided both m < 10000 and p < 10000. The complete table for
is over 20 times longer than that presented here and has much
the same general appearance. Table 2 of the Supplement gives the 36 values
with
for which
. This includes 18 cases where only a
lower bound for D = m+p is known.
Although there must be other factors involved, the argument of
§ 6 suggests that the
size of is directly related to the size of
. In particular, numbers
with smaller discriminants should have larger orbits. The prediction of § 6.6 is that
the orbit will be finite provided
. We illustrate this in Table 3, where
we list the values of
and
for the 11 Salem numbers
with a = -3, b=-1, so
. The omitted values of c correspond to
reducible polynomials.
One might expect that the size of the period of might depend on arithmetic
properties of
or perhaps on the existence of approximate multiplicative
relationships between the conjugates
of
with
. If this
were true, then one would expect powers of
to behave in a manner similar to
. A counterexample to this expectation is the
with
, where
. Here,
has
with
.
Exploring this theme further, we consider the powers of the smallest Salem number of
degree 6, , which has
. For
,
Table 4 gives
for the minimal polynomial of
, the values of m and
p,
and
. The factored form of
is given
for the sake of interest, although the arithmetic properties of
appear to play
no role here.
Table 4 (powers of
)