5

This number is a prime.

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6*5+1, 66*5+1, 666*5+1, 6666*5+1, 66666*5+1, 666666*5+1 and 6666666*5+1 are all primes. [Sariyar]

Submitted: 2019-01-05 01:40:39;   Last Modified: 2019-01-05 08:13:43.
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