557
This number is a prime.
The first and only prime p less than 10^5, where (p - 1)# + 2 = 0 (mod p). [Luhn]
There are 557 species of primates. [Smithson]
(There are 5 curios for this number that have not yet been approved by an editor.)
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell