A127889 Smallest n-digit right-truncatable prime.

2, 23, 233, 2333, 23333, 233993, 2339933, 23399339

Offset

1,1

Comments

Agrees with A088603 for 8 terms, but this sequence ends there while A088603 continues.

Right-truncatable means that the integer part of successive divisions by 10 always yields primes (or zero). - M. F. Hasler, Nov 07 2018

Links

Table of n, a(n) for n=1..8.

I. O. Angell and H. J. Godwin, On Truncatable Primes, Math. Comput. 31, 265-267, 1977.

Index entries for sequences related to truncatable primes

Prog

(PARI) A127889=vector(8, n, p=concat(apply(t->primes([t, t+1]*10), if(n>1, p))); p[1]) \\ M. F. Hasler, Nov 07 2018

Crossrefs

Cf. A024770, A050986, A088603, A127890.

Sequence in context: A356557 A198972 A065122 * A088603 A048549 A158191

Adjacent sequences: A127886 A127887 A127888 * A127890 A127891 A127892

Keyword

base,nonn,fini,full

Author

Ray Chandler, Feb 04 2007

Status

approved