[seqfan] More terms for A000445?

Chris Thompson cet1 at cam.ac.uk
Tue Dec 17 18:14:51 CET 2019


We have been editing https://oeis.org/A000445 "Latest possible occurrence of
the first consecutive pair of n-th power residues, modulo any prime" recently,
but this message is just to ask if anyone is aware of any computed values that
go beyond a(7).

That value was published, together with some lower limits for a(8,9,10),
in the 1964 paper https://doi.org/10.1090/S0025-5718-1964-0164923-X by John
Brillhart and Dick and Emma Lehmer. 55 years seems an awfully long time for
no [computational] progress to be have been made! Their paper mentions the
useful index registers on the IBM 7094...

Or if there really are no more values in the literature, does anyone feel
inclined to compute some?

-- 
Chris Thompson
Email: cet1 at cam.ac.uk




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