This number is a prime.
Just showing those entries submitted by 'Loungrides': (Click here to show all)
The smallest anti-Yarborough near-repunit non-palindromic prime is also the only anti-Yarborough prime that is the reverse concatenation of the prime factors of a repunit number, i.e., 1111=11*101. [Loungrides]
The smallest 5-digit prime formed from two primes with the same sum of digits. [Loungrides]