A342185 Primes q such that 10*q-1 and 10*q+3 are cousin primes.

2, 11, 23, 101, 149, 227, 239, 269, 353, 479, 557, 569, 647, 683, 809, 827, 983, 1289, 1607, 1619, 1823, 1901, 1907, 2039, 2213, 2411, 2447, 2843, 2879, 2957, 2963, 3011, 3119, 3257, 3389, 3557, 3671, 3833, 3923, 4001, 4019, 4397, 4943, 5099, 5309, 5441, 5471

Offset: 1

Author

Tamas Nagy, Mar 04 2021

Keywords

• nonn

Comments

A pair of cousin primes are primes of the form p and p+4 (where p+2 may or may not be a prime).

Generates cousin primes such that the last digits of the primes are 9 and 3 in base 10.

Crossrefs

Cf. A046132, A342184, A342183.

Programs

PARI

isok(p) = isprime(p) && isprime(10*p-1) && isprime(10*p+3); \\ Michel Marcus, Mar 05 2021