7523

This number is a prime.

Just showing those entries submitted by 'Beedassy': (Click here to show all)

The largest prime that contains only distinct prime digits. [Poo Sung and Beedassy]

The only derangement of the prime 2357 that is an emirp. Note that the concatenation of both primes (23577523) and their reversals (75323257) forms other primes. [Beedassy]

The smallest Honaker prime with all the prime digits: 7523 is the 953rd prime and 7 + 5 + 2 + 3 = 9 + 5 + 3. Note that the latter sum 17 and the concatenation 7523953 are also primes, as are the reversals 3257, 359, 71. [Beedassy]