OFFSET
1,1
COMMENTS
At the time of submission (June 2023), this sequence is the arithmetic progression of 27 primes having the largest known initial and final term and it was found by Tom Greer on 26 May 2023 as part of PrimeGrid's AP27, running the program AP26 (this is the second known AP27 to date, see A327760).
LINKS
Marco Ripà, Table of n, a(n) for n = 1..27
PrimeGrid forum, Message 163220 (World's Second AP27!!!)
FORMULA
a(n+1) = 277699295941594831 + n*170826477*223092870, for n = 0, 1, ..., 26.
EXAMPLE
a(3) = 277699295941594831 + 2*170826477*223092870 is prime.
MATHEMATICA
A363980[n_]:=277699295941594831 + (n-1)*38110169025918990;
Array[A363980, 27] (* Paolo Xausa, Jan 30 2024 *)
PROG
(PARI) vector(27, t, 277699295941594831+170826477*223092870*(t-1))
CROSSREFS
KEYWORD
nonn,fini,full,easy
AUTHOR
Marco Ripà, Jun 30 2023
STATUS
approved