The first proof of the irrationality of Pi was done by J.H. Lambert in 1768
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The value of pi has never been proven becauase it is an irrational number which can not be expressed as a fraction
It was known from ancient times that pi is irrational. However, that fact was proven in 1761 by the Swiss scientist Johann Heinrich Lambert.
It's been proven that pi is an irrational number. In other words, it can't bewritten with a finite number of digits, and there is no 'last digit'.
The square of pi is an irrational number.
Pi is an irrational number