158581domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the concatenated form 1nn1 where n is an integer >=0.at n=13A102497Primes such that the decimal digits in the first half of the number are a nontrivial permutation of the digits in the second half.at n=20A297994Primes having only {1, 5, 8} as digits.at n=38A385780Prime numbersat n=14567