This number is a prime.
Single Curio View: (Seek other curios for this number)61 is the smallest number m and only two-digit number m such that the reversal of concatenation of the first m natural numbers is prime. [Firoozbakht]
Submitted: 2004-06-24 10:23:53; Last Modified: 2008-01-30 11:28:00.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell