This number is a prime.

                                                           139109 8979592919

+ The larger of only two primes less than a googol, each formed by concatenating in reverse order the first n primes p ending with 9, p < 1000, (n=7). The smaller one is 592919, for n=3. [Loungrides]

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