Hi,
as a followup on the "Arbitrary precision in cython" thread, I'd like to
mention that one can directly use mpfr's implementation from within Sage:
sage: RealField(150)(10).eint()
2492.2289762418777591384401439985248489896471
It only works for real numbers, but has the advantage to guarantee correct
rounding (for the 150-bit binary result; if you are using the decimal
result above, you have to take into account the binary->decimal conversion
error, which is at most 1/2 ulp).
Paul Zimmermann
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