A233783 The smallest prime that produces a set of n primes such that every prime after the first one is equal to the previous minus the product of its nonzero digits.

2, 23, 251, 347, 5023, 50227, 64037, 3924211, 4952767, 43275737, 586635689, 592856489, 62527264517

Offset

1,1

Comments

a(14) > 6.8*10^11. - Giovanni Resta, Dec 16 2013

Links

Table of n, a(n) for n=1..13.

Example

Example: for n = 3, initial prime is 251, because 251 -> 251 - 2*5*1 = 241 -> 241 - 2*4*1 -> 233.

Crossrefs

Cf. A063543, A233692.

Sequence in context: A088085 A309221 A168128 * A300326 A068983 A083427

Adjacent sequences: A233780 A233781 A233782 * A233784 A233785 A233786

Keyword

nonn,base,hard

Author

Carlos Rivera, Dec 15 2013

Extensions

a(11)-a(13) from Giovanni Resta, Dec 16 2013

Status

approved