946

This number is a composite.

+ 946 is the only three-digit number m such that the reversal of concatenation of the first m natural numbers is prime. [Firoozbakht]

+ The largest known number n such that n is the sum of two consecutive primes but not the sum of two sums of two consecutive primes. [Capelle]

(There are 2 curios for this number that have not yet been approved by an editor.)

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