How many digits of $\pi$ are currently known?
How many digits of $\pi$ are currently known?
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reference-request
pi
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1Purged comments as they mostly refer to a previous version of the question. After Gerry's edit it is a completely different question and actually has an (albeit non-definitive and can stand to change with time) answer. – 2012-05-31
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1Re-opening as in the newly edited form it is not a duplicate of the chosen duplicate target. – 2012-05-31
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1You may also want to read-up on [the BBP extraction algorithm](http://en.wikipedia.org/wiki/Bailey%E2%80%93Borwein%E2%80%93Plouffe_formula#BBP_digit-extraction_algorithm_for_.CF.80) which allows one to compute the $n$th binary bit expansion of $\pi$ without computing the previous ones. – 2012-05-31
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5What do you mean by "known"? Nobody remembers the ten trillion. And they are not written down on paper. So we are talking about a computer beeing able to reproduce them. So all its digits are known. – 2012-05-31
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3@Xnyyrznaa: It is good that they are not all written down on paper, as [this page](http://www.csua.berkeley.edu/~ranga/humor/pi.txt) points out. – 2012-06-01
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9Old comments from downvoters (me being one of them) are purged since OP was fixed to a normal shape, and these comments don't reflect the current situation. Well, why the downvote? 1. I think the first version of OP is something the questions should be judged for as well. 2. You plagiarized another use to answer your own question. That answer you accepted. 3. Seems like you used another account of yours "Yatin K" to support yourself, and grant yourself a bounty. I think it is enough for to downvote. It is even too much – 2012-06-03
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0:P No its the other account – 2012-06-04