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I was the headmaster for a boarding school at Houghton-le-Spring, a coal mining area near Durham, England.

I published a table of all the prime numbers less than 60,000.

I determined the natural logarithms of 2, 3, 5 and 10 to 137 places.

I am best known for my calculation of pi to 707 decimal places in 1873, using the formula:

pi/4 = 4 arctan(1/5) - arctan(1/239).

Unfortunately, the mathematician Ferguson proved in 1944 that I had made an error in my approximation for pi in the 528th place.

Answer: William Shanks (1812-1882)