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prod auto-conversion to double

From: Rik
Subject: prod auto-conversion to double
Date: Mon, 21 Oct 2013 14:59:19 -0700



I was investigating factor() for large numbers above bitmax(), but still
below intmax(), and came across this behavior.  Is this desirable?  Should
we have a "native" option as we do for sum() so that the full precision can
be realized?


Sample case:

x = int64 ([3, 107, 28059810762433]);
class (x)
ans = int64
y = prod (x)
y =  9007199254740992
class (y)
ans = double
x(1) * x(2) * x(3)
ans = 9007199254740993

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