hum!!!
bitcoin it is the most mature coin..
and if you want your transaction will be confirmed,
you need to set a transaction fee!!!
or maybe you want to mean other thing
Bitcoin will be matured bitcoin after 101 blocks.
https://bitcoin.stackexchange.com/questions/10825/why-must-generated-coins-mature-120-blocks-before-they-can-be-spent
More about transaction fee: https://en.bitcoin.it/wiki/Transaction_fees
priority = sum(input_value_in_base_units * input_age)/size_in_bytes
Where input age is coin age, 1BTC left untouched for one day has a coin age of 1
hum... this seems wrong!!!!
i read the link posted by FSB..
https://en.bitcoin.it/wiki/Transaction_fees
it seem who imput_age are the confirmation number..
and so,
if we have 1 btc coin with 144 confirm (144 is the expected number of blocks per day) the result is:
10000000 * 144 / 500(tx size in byte) = 2880000.