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A219332 Irregular primes with irregularity index four. 6
12613, 15737, 43189, 56263, 72337, 76289, 77783, 84067, 102559, 108179, 109789, 109843, 109891, 115727, 115901, 120557, 125927, 127247, 135613, 149287, 155599, 161461, 169843, 172973, 178307, 179233, 184559, 188519, 192271, 198461, 206489, 218833, 220793, 221671 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000 (calculated by Hart et al., terms 1..1282 from T. D. Noe, calculated by Buhler et al.)
J. Buhler, R. Crandall, R. Ernvall, T. Metsankyla and M. A. Shokrollahi, Irregular Primes and Cyclotomic Invariants to 12 Million, J. Symbolic Computation 31, 2001, 89-96.
William Hart, David Harvey and Wilson Ong, Irregular primes to two billion, Mathematics of Computation, Vol. 86, No. 308 (2017), pp. 3031-3049; also available at arXiv:1605.02398 [math.NT], 2016.
David Harvey, Irregular primes to two billion (includes a list of all primes less than 2^31).
CROSSREFS
Sequence in context: A261860 A187136 A185841 * A254262 A254255 A254301
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Nov 18 2012
STATUS
approved

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Last modified April 21 07:37 EDT 2024. Contains 371850 sequences. (Running on oeis4.)