|
| |
|
|
A065508
|
|
Primes p such that p^2 - p + 1 is prime.
|
|
6
| |
|
|
2, 3, 7, 13, 67, 79, 139, 151, 163, 193, 337, 349, 379, 457, 541, 613, 643, 727, 769, 919, 991, 1021, 1093, 1117, 1201, 1231, 1381, 1423, 1549, 1567, 1597, 1621, 1693, 1747, 1789, 1801, 1933, 1987, 2011, 2017, 2113, 2137, 2143, 2239, 2281, 2557, 2647
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| The primes p^2 - p + 1 are in A074268.
|
|
|
LINKS
| T. D. Noe, Table of n, a(n) for n=1..1000
|
|
|
PROG
| (PARI) { n=0; for (m=1, 10^9, p=prime(m); if (isprime(p^2 - p + 1), write("b065508.txt", n++, " ", p); if (n==1000, return)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Oct 20 2009]
(MAGMA) [n: n in [0..10000]| IsPrime(n) and IsPrime(n^2 - n + 1)] [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 07 2010]
|
|
|
CROSSREFS
| Cf. A053182, A053184, A091567, A074268.
Sequence in context: A051452 A058017 A049536 * A078154 A192611 A048463
Adjacent sequences: A065505 A065506 A065507 * A065509 A065510 A065511
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Vladeta Jovovic (vladeta(AT)eunet.rs), Nov 26 2001
|
| |
|
|
