A089701 Largest n-digit member of A089699.

6, 82, 996, 9966, 99922, 999916, 9999942, 99999846, 999999936, 9999999726, 99999999598, 999999999576, 9999999999658, 99999999999928, 999999999999576, 9999999999999936, 99999999999999456, 999999999999999486

Offset

1,1

Links

Table of n, a(n) for n=1..18.

Maple

for d from 1 to 25 do for n from 10^d-1 by -1 to 10^(d-1) do m:=mul(j, j=convert(n, base, 10)): if isprime(m+1) and isprime(n+1) then printf("%d, ", n): break fi od od: # C. Ronaldo

Crossrefs

Cf. A089699, A089700.

Sequence in context: A135624 A222197 A089397 * A360346 A251584 A068253

Adjacent sequences: A089698 A089699 A089700 * A089702 A089703 A089704

Keyword

base,nonn

Author

Amarnath Murthy, Nov 10 2003

Extensions

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Dec 25 2004

Status

approved