25/01/1812 British amateur mathematician William Shanks is born
Earliest records of Pi (π) & history of the Ludolphine Number
He is famous for his calculation of π to 707 places, accomplished in 1873. His calculation was, however, only correct up to the first 527 places. The error was discovered in 1944 by D. F. Ferguson (using a mechanical desk calculator). Shanks also calculated other constants, like e, and published a table of primes up to 60 000.