143

This number is a composite.

+ The last 143 digits of 143143 form a prime number. [De Geest]

+ The smallest number which is bi-prime brilliant in all radices from 2 to 10. [Hartley]

+ The number of three-digit primes. [Patterson]

+ 100^143 - 143 is prime. Note that 143 is the second number with this property. [Firoozbakht]

+ The smallest tnaillirb, i.e., a brilliant number whose reversal is a different brilliant number. This is a special subset of emirpimes, with only 102 examples below 100000. [Post]

+ 1432 divides 143143. I love you, but now find a prime example like this. [Meller]

+ The smallest composite number c such that 5^c+2 is prime. [Loungrides]

+ Coniston Water Lake in the English county of Cumbria has an elevation of 143 feet above sea level.

(There is one curio for this number that has not yet been approved by an editor.)

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