51929597989

This number is a prime.

                                                                5 1929597989

+ The only prime formed from a digit d followed from the concatenation in order of all the double-digit primes that end with 9 (case d=5). [Loungrides]

(There is one curio for this number that has not yet been approved by an editor.)

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