29

This number is a prime.

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There are 29 distinct-odd digit primes each consisting of all the odd digits. These primes are: 13597, 13759, 15739, 15937, 15973, 17359, 17539, 19753, 39157, 51973, 53197, 53719, 53917, 57139, 57193, 71359, 71593, 73951, 75193, 75391, 75913, 75931, 79153, 79531, 91573, 91753, 95317, 95713, 95731. [Loungrides]

Submitted: 2020-11-12 07:04:45;   Last Modified: 2020-11-13 07:01:55.
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