First 4 chen primes

Chen primes: A prime number p is called a Chen prime if p + 2 is either a prime or semiprime.

First 4 chen primes have values between 2 and 7.

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

2, 3, 5, 7

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• All chen primes