479

This number is a prime.

Just showing those entries submitted by 'Galliani': (Click here to show all)

+ The pair of consecutive primes (479, 487) is the only pair, at least up to 10^9, of consecutive primes (p,q) such that the reverse of the digits of p is equal to 2*q. [Galliani]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell