Question

Series and Sequence
how are these numbers connected ?
4, 21 , 143, 1061 , 8363 , .....

Answer 1

hate these questions >.>

Answer 2

They are the number of primes with the specified number of digits.

There are 4 primes with 1 digit: {2, 3, 5, 7}
there are 21 prrimes with 2 digits {11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97}
and 143 promes with three digits, etc.

Answer 3

divanshu did you understood my answer?

Answer 4

i hope i helped u

Answer 5

ya, i did, so how can we get the next number in series ?