Hi,

A user reports (and I confirm) that if P is pretty much any point on
an elliptic curve over a finite field, then

   (-2^63)*P

hangs forever.  For example,

E = EllipticCurve(GF(5),[0,1])
P = E.random_element()
(-2^63)*P   # hangs

-- 
William (http://wstein.org)

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