A133149 Greatest product of two primes made up together of digits 0 to n once.

206, 9223, 211763, 3229763, 46218553, 651191243, 8437304723

Offset

3,1

Links

Table of n, a(n) for n=3..9.

Example

We have
a(3) = 103*2 = 206.
a(4) = 401*23 = 9223.
a(5) = 503*421 = 211763.(and not 523*401 which is smaller)
a(6) = 6421*503 = 3229763.(and not 5021*643 which is smaller)
a(7) = 7451*6203 = 46218553.(and not 7043*6521 which is smaller)
a(8) = 85201*7643 = 651191243.(and not 76423*8501 which is smaller)
a(9) = 96401*87523 = 8437304723.(and not 96703*84521 which is smaller)

Crossrefs

Cf. A125722.

Sequence in context: A054007 A285754 A201032 * A080530 A192825 A045069

Adjacent sequences: A133146 A133147 A133148 * A133150 A133151 A133152

Keyword

fini,full,nonn,base

Author

Lekraj Beedassy, Dec 16 2007

Status

approved