Megatron!
I'm not sure what you're asking. The smallest number that can't be between two primes is obviously 1. Once you start running into primes, every composite number is between at least two primes.
The primes between 1 and 10 are:2, 3, 5, 7The primes between 1 and 10 are:2, 3, 5, 7The primes between 1 and 10 are:2, 3, 5, 7The primes between 1 and 10 are:2, 3, 5, 7
Twin primes between 50 and 100 are {59, 61} and {71, 73}.
The only consecutive primes between 1 and 100 are 2 and 3.
41 and 43 are only the pair of Twin primes between 40 and 50.
Primes less than 202, 3, 5, 7, 11, 13, 17, 19,Primes between 20 and 4023, 29, 31, 37,Primes between 40 and 6041, 43, 47, 53, 59,Primes between 60 and 8061, 67, 71, 73, 79,Primes between 80 and 10083, 89, 97
Six has four factors and is in between the twin primes 5 and 7.
There is no limit: gaps between successive primes can be arbitrarily large. As of 2014, the largest prime gap between proven primes is 1,113,106. The two successive primes at either end have 18662 digits each. A larger gap, of 3,311,852 numbers between probable primes has been conjectured.
One pair of twin primes between 135 and 145
There are no fixed differences. In fact, gaps between successive primes can be arbitrarily large. As of 2014, the largest prime gap between proven primes is 1,113,106. The two successive primes at either end have 18662 digits each. A larger gap, of 3,311,852 numbers between probable primes has been conjectured.
The only twin primes (prime numbers which differ by 2) between 30 and 60 are (41, 43)
All pairs of two primes are coprime. There are fifteen primes under 50. So that means there are 105 unique pairs of "coprime primes", or more generally, pairs of primes, under 50.