The is no last Prime number - unless you are counting down, in which case, it is 2.
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The last prime number before 100 is 97
There is no last prime number: they go on for ever. The first prime larger than 100 is 101.
Last prime of the 20th Century was 1999. Last prime of the 21st Century will be 2099.
A balanced prime number is a prime number that is equal distance from the last prime before it and the next prime after it. Example: 53 is a balanced prime. The last prime number before it was 47 and the next prime after it is 59. (53 - 47) and (59 - 53) both equal 6, so 53 is a balanced prime.
997 is the last 3 digit prime number