A219332 Irregular primes with irregularity index four.

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

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

Cf. A061576, A007703, A000928, A073276, A073277, A060975, A219333, A219334, A219335.

Sequence in context: A261860 A187136 A185841 * A254262 A254255 A254301

Adjacent sequences: A219329 A219330 A219331 * A219333 A219334 A219335

Keyword

nonn

Author

Robert G. Wilson v, Nov 18 2012

Status

approved