This number is a prime.

+ The prime obtained from the concatenation of the three successive missed out values (61, 89, 107) in Mersenne's own compiled list of exponents for Mersenne primes. Note that the smallest number formed using all the digits involved (1016789) is an emirp. [Beedassy]

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