## Probability of prime numbers

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• Before asking my question let me specify my credentials: high school maths. (so please spare me if the question is too easy/too absurd) Q. What is the
Message 1 of 2 , Dec 27, 2007
Before asking my question let me specify my credentials: high school
maths. (so please spare me if the question is too easy/too absurd)

Q. What is the probability that a number picked at random, is prime?
(if the exact answer cannot be arrived at then is it possible to arrive
at one with "reasonable" accuracy?)

Worth a thought,

Rajeev
• ... Short answer: 1/log(n) Long answer: http://primes.utm.edu/howmany.shtml Bernardo Boncompagni ________________________________________________ When the
Message 2 of 2 , Dec 27, 2007
Rajeev Batra dice:

> Q. What is the probability that a number picked at random, is prime?
> (if the exact answer cannot be arrived at then is it possible to arrive
> at one with "reasonable" accuracy?)

Bernardo Boncompagni

________________________________________________

"When the missionaries arrived, the Africans had
the land and the missionaries had the bible.
They taught how to pray with our eyes closed.
When we opened them, they had the land and we