1,1

Tanya Khovanova, Non Recursions

179210312 = 2^3* 4733^2; 9 digits in 179219312, 7 digits in its prime factorization, 7 < 9, so that number is economical.

Cf. A046759.

Sequence in context: A093047 A093046 A127955 this_sequence A079323 A061440 A064593

Adjacent sequences: A047735 A047736 A047737 this_sequence A047739 A047740 A047741

fini,nonn

Carlos B. Rivera (crivera(AT)primepuzzles.net)