A239007 Difference between the smallest 10^n-digit member of a sexy prime pair and 10^(10^n - 1).

4, 87, 34951, 73203, 475341523

Offset

0,1

Links

Table of n, a(n) for n=0..4.

G. L. Honaker, Jr. and Chris Caldwell, Prime Curios! 10000...34951 (100-digits)

Eric Weisstein's World of Mathematics, Sexy Primes. [The definition in this webpage is unsatisfactory, because it defines a "sexy prime" as a pair of primes.- N. J. A. Sloane, Mar 07 2021]

Mathematica

lst = {}; Do[s = 10^(10^n - 1); n = NextPrime[s]; While[! PrimeQ[n + 6], n = NextPrime[n]]; AppendTo[lst, n - s], {n, 0, 2}]; lst

Crossrefs

Cf. A023201.

Sequence in context: A220277 A122209 A059577 * A254652 A028554 A303153

Adjacent sequences: A239004 A239005 A239006 * A239008 A239009 A239010

Keyword

nonn,base,hard,more

Author

Arkadiusz Wesolowski, Mar 08 2014

Status

approved