

A104323


Primes which are the reverse concatenation of four consecutive numbers.


1



10987, 22212019, 86858483, 94939291, 100999897, 106105104103, 112111110109, 122121120119, 124123122121, 146145144143, 184183182181, 226225224223, 232231230229, 244243242241, 274273272271, 332331330329, 362361360359
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


LINKS



EXAMPLE

The first term is 10987 which is a prime and is the reverse concatenation of 7,8,9 and 10 which are four consecutive numbers.


MATHEMATICA

Select[Table[FromDigits[Flatten[IntegerDigits/@Range[n, n3, 1]]], {n, 4, 400}], PrimeQ] (* Harvey P. Dale, Aug 02 2021 *)


PROG

(PARI) forstep(n=10, 400, 2, isprime(t=eval(Str(n, n1, n2, n3)))&print1(t", ")) \\ Zak Seidov, May 08 2013


CROSSREFS



KEYWORD

base,nonn


AUTHOR



STATUS

approved



