This should be good for Float, no longer need FRAC.

diff --git a/src/algebra/float.spad b/src/algebra/float.spad
index 3996e67..301612a 100644
--- a/src/algebra/float.spad
+++ b/src/algebra/float.spad
@@ -977,6 +977,14 @@
          (q0, q1) := (q1, q2)
          (s, t) := (t, r)

+   hashUpdate!(s : HashState, x : %) : HashState ==
+       m : I := x.mantissa
+       e : I := x.exponent
+       while (tmp := m exquo BASE) case I repeat
+           m := tmp::I
+           e := e + 1
+       s := hashUpdate!(s, m)
+       hashUpdate!(s, e)

 --% Float: arbitrary precision floating point arithmetic domain

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