A067388 Initial prime in set of 4 consecutive primes with common gap 48.

55410683, 102291263, 141430363, 226383163, 280064453, 457433213, 531290533, 542418463, 555695713, 582949903, 629444003, 664652203, 665813153, 777809113, 802919653, 852404053, 887653633, 894328243, 898734673, 979048313, 993517643

Offset: 1

Author

Labos Elemer, Jan 21 2002

Keywords

• nonn

Links

• Chai Wah Wu, Table of n, a(n) for n = 1..1000 (terms 1..102 from Zak Seidov)
• Index entries for sequences related to primes in arithmetic progressions

Crossrefs

Analogous sequences (with differences in square brackets): A033451[6], A033447[12], A033448[18], A052242[24], A052243[30], A058252[36], A058323[42], this sequence[48].

Programs

Mathematica

Transpose[Select[Partition[Prime[Range[10000000]], 4, 1], Union[Differences[#]]=={48}&]][[1]] (* Vincenzo Librandi, Jun 21 2015 *)

Python

from sympy import isprime, nextprime
A067388_list, p = [], 2
q, r, s = p+48, p+96, p+144
while s <= 10**10:
    np = nextprime(p)
    if np == q and isprime(r) and isprime(s) and nextprime(q) == r and nextprime(r) == s:
        A067388_list.append(p)
    p, q, r, s = np, np+48, np+96, np+144 # Chai Wah Wu, Jun 01 2017

Extensions

a(7)-a(21) from Donovan Johnson, Sep 05 2008