37
This number is a prime.
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A prime-digit prime made up of additive persistence
p and digital root r of
NN, where repdigit N
consists of d digits d with d =
r - p, i.e., 4 = 7 - 3. [Beedassy]
Submitted: 2019-02-03 12:36:30; Last Modified: 2019-02-03 14:49:01.
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