79

This number is a prime.

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

Kari Phillips ©2003
+ An emirp and sum of three reversible primes: 79 = 11 + 31 + 37. Curiously, the sum holds for the reversals: 97 = 11 + 13 + 73. [Silva]

+ The smallest prime which is arithmetic average of the two previous and two next primes. [Silva]

+ Subtract 79 from 7!+9! and you will have another emirp. [Silva]

+ The smallest emirp whose reversal is the next emirp after it. [Silva]

(There are 3 curios for this number that have not yet been approved by an editor.)

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