First 5 long primes

Long primes: Long prime in base b is a prime number p such that the formula (b^(p-1)-1)/p (where p does not divide b) gives a cyclic number.

First 5 long primes have values between 7 and 29.

Checkout list of first: 10, 50, 100, 500, 1000 long primes. You can also check all long primes.

7, 17, 19, 23, 29

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