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A112634 Mersenne prime indices that are not Gaussian primes. 5
2, 5, 13, 17, 61, 89, 521, 2281, 3217, 4253, 9689, 9941, 11213, 19937, 21701, 23209, 44497, 132049, 859433, 1398269, 2976221, 3021377, 6972593, 13466917, 30402457, 32582657, 42643801, 43112609 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
57885161, 74207281 and 77232917 are in this sequence as well. - Ivan Panchenko, Apr 13 2018
82589933 is in the sequence as well. - David Benjamin, Mar 30 2022
LINKS
C. K. Caldwell, The largest known primes.
FORMULA
A000043 INTERSECT A002313. - R. J. Mathar, Oct 06 2008
A000043 SET-MINUS A112633.
PROG
(PARI) is(n)=n%4 < 3 && isprime(n) && isprime(2^n-1) \\ Charles R Greathouse IV, Nov 28 2016
CROSSREFS
Sequence in context: A164620 A333876 A156013 * A303281 A235204 A354706
KEYWORD
nonn
AUTHOR
Jorge Coveiro, Dec 27 2005
EXTENSIONS
Edited by R. J. Mathar, Oct 06 2008
a(26)-a(28) from Ivan Panchenko, Apr 13 2018
STATUS
approved

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Last modified June 21 06:22 EDT 2024. Contains 373540 sequences. (Running on oeis4.)