First 20 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 20 long primes have values between 7 and 233.

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

7, 17, 19, 23, 29, 47, 59, 61, 97, 109, 113, 131, 149, 167, 179, 181, 193, 223, 229, 233

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