This number is a prime.

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

+ The smallest isolated prime (i.e., not a member of a twin prime pair) of form 6n + 1. [Beedassy]

+ The lesser prime of the smallest emirp pair both of which are Pythagorean, i.e., expressible as the sum of two squares: 37 = 12 + 62 ; 73 = 32 + 82. Note that the derived palindromic prime of the form "primemirp" is also Pythagorean: 373 = 72 + 182. [Beedassy]

+ The smallest emirp separated from its adjacent primes on each side by a prime number of successive composites. [Beedassy]

+ A prime-digit prime made up of additive persistence p and digital root r of NN, where repdigit N consists of d digits d with d = r - p, i.e., 4 = 7 - 3. [Beedassy]

(There are 4 curios for this number that have not yet been approved by an editor.)

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