Million digits of pi

From SymPy

<source lang="python"> In [1]: %time a = pi.evalf(10**6) CPU times: user 7.44 s, sys: 0.06 s, total: 7.50 s Wall time: 7.51 s

In [2]: len(str(a)) Out[2]: 1000001 </source>

In SymPy 0.6.0 you would use:

<source lang="python"> In [1]: from sympy.mpmath import mpf, mp, pi

In [2]: mp.dps = 10**6

In [3]: %time a = mpf(pi) CPU times: user 7.48 s, sys: 0.05 s, total: 7.53 s Wall time: 7.54 s

In [4]: len(str(a)) Out[4]: 1000001 </source>

You need to have gmpy installed for this to work. Otherwise mpmath will use python integers instead and it will take much, much longer.

First 50 digits:

<source lang="python"> In [5]: str(a)[:50] Out[5]: 3.141592653589793238462643383279502884197169399375 </source>

Last 50 digits:

<source lang="python"> In [6]: str(a)[-50:] Out[6]: 95678796130331164628399634646042209010610577945815 </source>