

A053302


Largest ndigit prime at the start of a record in the RECORDS transform of the prime gaps.


2



7, 89, 887, 9551, 31397, 492113, 4652353, 47326693, 436273009, 4302407359, 42652618343, 738832927927, 7177162611713, 90874329411493, 218209405436543, 1693182318746371
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OFFSET

1,1


COMMENTS

a(17) is probably 80873624627234849 and a(19) is probably 8822016561303449927.  Robert G. Wilson v, Mar 16 2004
a(18) is most probably 804212830686677669.  M. F. Hasler, Apr 25 2014
Is this a duplicate of A073861 (except for the first term)?  M. F. Hasler, Apr 25 2014


LINKS

Table of n, a(n) for n=1..16.
Thomas R. Nicely, Some Results of Computational Research in Prime Numbers [Local copy, pdf only] [ See local copy in A007053]
Eric Weisstein's World of Mathematics, Prime Gaps


FORMULA

a(n) = { max p: p in A002386; p< 10^n}.  R. J. Mathar, Feb 01 2008


EXAMPLE

a(5)=31397, the last 5digit prime to begin a gap.


CROSSREFS

The length of the gap is in A053303.
Sequence in context: A089394 A068692 A178006 * A068877 A121044 A107109
Adjacent sequences: A053299 A053300 A053301 * A053303 A053304 A053305


KEYWORD

nonn,base


AUTHOR

Enoch Haga, Mar 05 2000


EXTENSIONS

Corrected by Jud McCranie, Jan 03 2001
a(15) and a(16) from Robert G. Wilson v, Mar 16 2004
Edited by R. J. Mathar, Feb 01 2008


STATUS

approved



