# 323

This number is a composite.

The smallest palindrome whose factors are twin primes (17 * 19). [Russo]

323 doubled up (i.e., 323323) has five consecutive prime factors which when squared and summed, yield 989, another palindrome! [De Geest]

323 is the smallest Lucas pseudoprime. [Terr]

Probably the onhy palindrome formed from consecutive primes and having as sole divisors a pair of twin primes. [Silva]

(There are 7 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