OFFSET
1,1
COMMENTS
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
Hart et al. found the first 86 terms. - Amiram Eldar, Mar 05 2019
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..86
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.
Joe P. Buhler and David Harvey, Irregular primes to 163 million, Math. Comp., Vol. 80, No. 276 (2011), 2435-2444.
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
KEYWORD
hard,nonn
AUTHOR
Robert G. Wilson v, Nov 18 2012
EXTENSIONS
a(6)-a(25) from Amiram Eldar, Mar 05 2019
STATUS
approved