1,1
Also numbers n such that (73*10^n+53)/9 is prime.
There are no further terms < 2400. - Stefan Steinerberger (hansibal(AT)hotmail.com), Nov 06 2005
Makoto Kamada, Factorizations of 811...117.
Index entries for primes involving repunits.
Do[ If[ PrimeQ[(73*10^n + 53)/9], Print[n]], {n, 0, 10000}]
Sequence in context: A056404 A056405 A009216 * A109228 A103162 A066006
Adjacent sequences: A103069 A103070 A103071 * A103073 A103074 A103075
nonn
Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 19 2005
a(9) from Kamada data by Robert Price (pamandbobprice(AT)yahoo.com), Dec 14 2010
