

A087807


Prime factors of terms occurring in A014960.


0



23, 47, 14759, 49727, 124799, 304751, 497261, 609503, 1828507, 2685259, 10741037, 12872687, 13877879, 23462213, 23652649, 27755759, 29134267, 31908959, 53753807, 65205263, 132771091, 218148653, 341965703, 551361983, 734951759
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


COMMENTS

Most terms in A014960 have the form (23^m * 47^n), all seem to be divisible by 23; A014960(12) is divisible by 23, but has an "exceptional and noisy" prime factor; there are certainly other ones, not known yet.
Prime p is in this sequence if the multiplicative order of 24 modulo p is the product of smaller terms of this sequence.  Max Alekseyev, May 26 2010


LINKS

Table of n, a(n) for n=1..25.


EXAMPLE

A014960(12) = 2870377 = 23 * 124799


CROSSREFS

Cf. A014960.
Cf. A057719, A171980, A134360, A136372, A136373, A129729.  Max Alekseyev, May 26 2010
Sequence in context: A157358 A158238 A042056 * A044100 A044481 A132764
Adjacent sequences: A087804 A087805 A087806 * A087808 A087809 A087810


KEYWORD

hard,nonn


AUTHOR

Thomas Baruchel, Oct 14 2003


EXTENSIONS

Corrected and extended by Max Alekseyev, May 26 2010


STATUS

approved



