7649

This number is a prime.

+ The only emirp that can be represented as sum of all the 3-digit primes beginning with the same digit d, (d=4), i.e., 401+409+...+499. [Loungrides]

+ The only 4-digit emirp p such that p+1 is an EPRN, (see PC2521). [Loungrides]

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