821
This number is a prime.
Single Curio View: (Seek other curios for this number)
The smallest of the prime quadruplet which is the largest
of the three 3-digit prime quadruplets {101, 103, 107,
109}, {191, 193, 197, 199} and {821, 823, 827, 829} has, as
digital reversal, the number of 6-digit prime quadruplets
(128). [Post]
Submitted: 2009-04-01 05:00:34; Last Modified: 2011-03-07 17:51:54.
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