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Centered Heptagonal Primes

A centered heptagonal number is a centered figurate number that represents a heptagon with a dot in the center and all other dots surrounding the center dot in successive heptagonal layers. The centered heptagonal number for n is given by the formula (7n2 − 7n + 2) / 2.

Centered heptagonal primes are such numbers which are also primes.

First 20: 43, 71, 197, 463, 547, 953, 1471, 1933, 2647, 2843, 3697, 4663, 5741, 8233, 9283, 10781, 11173, 12391, 14561, 18397

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

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

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