# Elliptic Curve: Python int too large to convert to C long

I'd like to plot the secp256k1 curve, but I get "Python int too large to convert to C long". Does sage have a built-in type to handle large numbers, or is there a recommended way to do this?

```
p=2^256 - 2^32 - 2^9 - 2^8 - 2^7 - 2^6 - 2^4 - 1
A=0
B=7
F=GF(p)
F=GF(p)
E = EllipticCurve( [A,B] )
show(graphics_array([plot(E,thickness=3), plot(E.change_ring(GF(p)))]), frame=True)
```

Traceback:

```
Traceback (most recent call last): A=0
File "", line 1, in <module>
File "/private/var/folders/k6/lrb1z5jd7vx95c7lh05kq6v00000gn/T/tmpmwcLjo/___code___.py", line 14, in <module>
exec compile(u'show(graphics_array([plot(E,thickness=_sage_const_3 ), plot(E.change_ring(GF(p)))]), frame=True)
File "", line 1, in <module>
File "/Users/Jbaczuk/Documents/Personal/SageMath/local/lib/python2.7/site-packages/sage/misc/decorators.py", line 567, in wrapper
return func(*args, **options)
File "/Users/Jbaczuk/Documents/Personal/SageMath/local/lib/python2.7/site-packages/sage/plot/plot.py", line 1941, in plot
G = funcs.plot(*args, **original_opts)
File "/Users/Jbaczuk/Documents/Personal/SageMath/local/lib/python2.7/site-packages/sage/schemes/elliptic_curves/ell_finite_field.py", line 107, in plot
G += plot.points([P[0:2] for P in self.points() if not P.is_zero()], *args, **kwds)
File "/Users/Jbaczuk/Documents/Personal/SageMath/local/lib/python2.7/site-packages/sage/schemes/elliptic_curves/ell_finite_field.py", line 208, in points
v = self._points_via_group_structure()
File "/Users/Jbaczuk/Documents/Personal/SageMath/local/lib/python2.7/site-packages/sage/schemes/elliptic_curves/ell_finite_field.py", line 150, in _points_via_group_structure
for m in range(1,ni[0]):
OverflowError: Python int too large to convert to C long
```