Centered decagonal primes up to 644

Centered decagonal primes: Primes of the form 5(n^2 + n) + 1.

There is 7 centered decagonal primes smaller than 644.

Checkout centered decagonal primes up to: 100, 500, 1000, 10000.

11, 31, 61, 101, 151, 211, 281

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