This number is a prime.

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

+ The larger of only two 4-digit primes, each concatenated from a safe prime, 2p+1, and the corresponding Sophie Germain prime p, case p=23. The other is 2311. [Loungrides]

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