

A054681


Start of a run of consecutive primes of length n each ending with the same digit.


8



2, 139, 1627, 18839, 123229, 776257, 3873011, 23884639, 36539311, 196943081, 452942827, 73712513057, 154351758091, 154351758091, 4010803176619, 6987191424553, 71894236537009, 196948379177587, 253931039382791
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OFFSET

1,1


COMMENTS

n consecutive primes differ by a multiple of 10 starting at a(n).
n consecutive primes that are congruent mod 10, i.e., they are not necessarily in arithmetic progression.


LINKS



EXAMPLE

a(2)=139 because 139 and 149 are the first consecutive primes to share a terminal digit.


PROG

(PARI) i=1; s=0; d=0; l=0; forprime(p=1, 500000, if(p%10==d, l++, if(l>=i, print(s); i++); s=p; d=p%10; l=1)) \\ (Carmody)


CROSSREFS



KEYWORD

nonn,base


AUTHOR



EXTENSIONS



STATUS

approved



