Me, 73.
3.14159265358979323846264338327950288419716939937510582097494459230
7816406. A lot, huh?
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here is 150 digits of pi by memory; 3.14159265358979323846264338327950288419716939937510582097494459230781640 628620899862803482534211706798214808651328230664709384460955058223179408128
There is 5 trillion digits of pi.
A Japanese psychiatrist memorized 83,431 digits of pi. This man is Akira Haraguchi.
And what use can you make of so many digits? 10-15 digits are more than enough for any practical calculation. Anyway, search Google for "digits of pi", and you'll get several places where pi is listed to many digits.
there is 116 ones in the 1000 digits of pi. heres a site with the answer http://www.eveandersson.com/pi/precalculated-frequencies