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Irregular primes with irregularity index seven.
6

%I #26 Mar 05 2019 18:17:13

%S 3238481,5216111,5620861,9208289,32012327,192539449,197456669,

%T 241759951,294014299,315034487,329438539,347672873,348049913,

%U 351984683,412348919,465404153,480509321,497070473,530088179,573652109,595050143,625827959,641663437,690262997,702149209

%N Irregular primes with irregularity index seven.

%C a(1)-a(4) were reported in Buhler, Crandall, Ernvall, Metsänkylä, Shokrollahi, 2001. a(5) was reported in Buhler, Harvey, 2011. - _Felix Fröhlich_, Jan 07 2017

%C Hart et al. found the first 86 terms. - _Amiram Eldar_, Mar 05 2019

%H Amiram Eldar, <a href="/A219335/b219335.txt">Table of n, a(n) for n = 1..86</a>

%H J. Buhler, R. Crandall, R. Ernvall, T. Metsankyla and M. A. Shokrollahi, <a href="http://dx.doi.org/10.1006/jsco.1999.1011">Irregular Primes and Cyclotomic Invariants to 12 Million</a>, J. Symbolic Computation 31, 2001, 89-96.

%H Joe P. Buhler and David Harvey, <a href="https://doi.org/10.1090/S0025-5718-2011-02461-0">Irregular primes to 163 million</a>, Math. Comp., Vol. 80, No. 276 (2011), 2435-2444.

%H William Hart, David Harvey and Wilson Ong, <a href="https://doi.org/10.1090/mcom/3211">Irregular primes to two billion</a>, Mathematics of Computation, Vol. 86, No. 308 (2017), pp. 3031-3049; also available at <a href="https://arxiv.org/abs/1605.02398">arXiv:1605.02398 [math.NT]</a>, 2016.

%H David Harvey, <a href="https://web.maths.unsw.edu.au/~davidharvey/papers/twobillion/">Irregular primes to two billion</a> (includes a list of all primes less than 2^31).

%Y Cf. A061576, A007703, A000928, A073276, A073277, A060975, A219332, A219333, A219334.

%K hard,nonn

%O 1,1

%A _Robert G. Wilson v_, Nov 18 2012

%E a(6)-a(25) from _Amiram Eldar_, Mar 05 2019