A127889 Smallest n-digit right-truncatable prime.

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

Offset: 1

Author

Ray Chandler, Feb 04 2007

Keywords

• base
• nonn
• fini
• full

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

• I. O. Angell and H. J. Godwin, On Truncatable Primes, Math. Comput. 31, 265-267, 1977.
• Index entries for sequences related to truncatable primes

Crossrefs

Cf. A024770, A050986, A088603, A127890.

Programs

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