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

1,1

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.

Links

Table of n, a(n) for n=1..47.

Prog

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

Crossrefs

Cf. A046132, A342184, A342183.

Sequence in context: A106974 A198277 A218046 * A217309 A378697 A115374

Adjacent sequences: A342182 A342183 A342184 * A342186 A342187 A342188

Keyword

nonn

Author

Tamas Nagy, Mar 04 2021

Status

approved