This number is a prime.

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

+ The smallest diagonal emirp. (A diagonal prime is a prime of n^2 digits (n > 1) arranged left-right, top-down in a n-by-n matrix, where the diagonals are also prime in each direction). [Loungrides]

+ (1733, 3371) is the only pair of 4-digit emirps formed by inserting an emirp between the digits of another emirp, i.e., inserting the emirp 73 between the digits of emirp 13 and the emirp 37 between the digits of emirp 31. [Loungrides]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell