This number is a prime.

+ If A = 37, B = 59, C = 67, ..., Z = 463, using the irregular prime alphabet, then 'PRIME' is an irregular prime. [Homewood]

+ 1283 is the smallest number m such that 1000! + m is prime. [Firoozbakht]

+ The smallest emirp displayed on a calculator that when reflected horizontally shows another emirp: 1583. [Beedassy]

+ A prime minimal row sum in Honaker's Triangle Problem. Can you find a larger example?

(There are 3 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