The P+41 spiral contains an unusually large number of primes because 163 is a He... | Hacker News

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cperciva on Jan 2, 2017 | parent | context | favorite | on: Prime Number Spiral

The P+41 spiral contains an unusually large number of primes because 163 is a Heegner number (https://en.wikipedia.org/wiki/Heegner_number).

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