138959
This number is a prime.
Single Curio View: (Seek other curios for this number)
Largest number n (coincidentally prime) such that the nth
triangular number contains each of the 10 decimal digits
exactly once i.e. T(138959) = 9654871320. [Gupta]
Submitted: 2013-09-14 13:06:56; Last Modified: 2019-01-30 07:28:31.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell