For one processor 
steps (N)	Error (%)
x		y
1		1.859163578813025
10		0.026525762668592
100		0.000265258238453
1000  		0.000002652582265
10000		0.000000026526052
100000		0.000000000266389
1000000		-0.000000000000919
10000000	-0.000000000001979

For Number of steps = 1000000
Processors (p)	Error (%)
1	-0.000000000001979
2	0.000000000003378
3	0.000000000003548
4	0.000000000002615
5	0.000000000003774
6	0.000000000002855
7	0.000000000003223
8	0.000000000002474