A213175 Primes p such that subtracting two from any single decimal digit of p produces another prime with restriction that first digit may not be changed to a 0 (obviously p cannot contain digits less than 2).

5, 7, 43, 73, 463, 859, 883, 3559, 3823, 4273, 77269

Offset

1,1

Comments

Starting from composites instead of primes we obtain much larger terms, like 92997492273. - Giovanni Resta, Feb 27 2013

Links

Table of n, a(n) for n=1..11.

G. L. Honaker, Jr. and Chris Caldwell, Prime Curios! 77269

Carlos Rivera, Puzzle 377

Example

463 belongs to this sequence because 463, 461, 443 and 263 are all prime.

Crossrefs

Sequence in context: A292010 A064082 A274907 * A265786 A090520 A066219

Adjacent sequences: A213172 A213173 A213174 * A213176 A213177 A213178

Keyword

nonn,base,fini,full

Author

Arkadiusz Wesolowski, Feb 27 2013

Status

approved