Permutation primes are primes that have digits that can be rearranged with every possible rearrangement being a prime. Some examples of permutation prime sets are {13, 31}, {17, 71}, {79, 97}, {113, 131, 311}, and {337, 373, 733}.
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Yes, 29 and 31 are twin primes.Explanation:A pair of primes that differ by 2 are called twin primes.29 and 31 both are primes and their difference is 31-29 = 2. So, the given pair of primes is twin primes.
As the primes when subtracted leave a difference of 2,they are said to be twin primes.
The products of the primes are the composites.
the first 5 primes are 2,3,5,7,11
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.