Primes of the form:
p-1: does not contain parity digit 4
p: prime/ parity digit is 1
p+1: contains parity digit 4
Example:
12: 323
13: 1
14: 34
This pattern seems to follow: Proth primes – https://oeis.org/A080076 from n=2 onwards
Primes of the form:
p-1: parity digits start with 32
p: prime/ parity digit is 1
p+1: parity digits start with 34
Example
16: 322
17: 1
18: 343
This pattern seems to follow: Primes of form 4n + 1 – https://oeis.org/A002144
Primes of the form:
p-1: parity digits start with 34
p: prime/ parity digit is 1
p+1: parity digits start with 32
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Example
22: 34
23: 1
24: 3232
This pattern seems to follow: Primes of the form 4n+3. – https://oeis.org/A002145
Primes of the form:
p: prime/ parity digit is 1
p+1: parity digits are 34
Example
37: 1
38: 34
This pattern seems to follow: Numbers n such that both n and (n+1)/2 are primes – https://oeis.org/A005383 from n=2 onwards
Primes of the form:
p-1: parity digits start with 324
p: prime/ parity digit is 1
p+1: parity digits start with 3
Example
52: 324
53: 1
54: 3434
This pattern seems to follow: Primes of the form 24n + 5. – https://oeis.org/A107003 from n=2 onwards
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