prime 1 - 9 are 5
prime 9-99 are 21
prime 99 - 999 are 143
prime 999-9999 are 1061
prime 9999-99999 are 8363
prime 99999-999999 are 68906
prime 999999-9999999 are 586081
chakravarthy
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999999 ones in 999999
An infinite amount
The only consecutive primes between 1 and 100 are 2 and 3.
there are 99999 there are 99999
25 of them.
One of them.
One pair of twin primes between 135 and 145
There are 449999 such numbers.
There are 40 palindromes that are divisible by 25
There are 89,999 numbers between 100,000 and 999,999 that are divisible by 10.
There are four pairs of twin primes between 2 and 35: (5,7) (11,13) (17,19) (29,31).
There are 20 palindromes between 10,000 and 99,999 that are divisible by 25.