A084319 Orbit of 91 under function described in A084317.

91, 713, 2331, 3737, 37101, 383149, 1329473, 10912197, 328312853, 1129846623, 3735159117, 31245053039, 173977184859, 3293176308321, 319269241788861, 371325123869195203, 1278647733810375857, 1665622037676698019, 31742715741254857303, 56627509560552923867

Offset: 0

Author

Labos Elemer, Jun 16 2003

Keywords

• base
• nonn

Comments

This sequence takes 64 steps to reach a prime (which implies A343156(91)=64). - N. J. A. Sloane, Apr 07 2021

Examples

			a(29) = 19797186041838357425713338412621, the 29th iterate.
		

References

• Eric Angelini, W. Edwin Clark, Hans Havermann, Frank Stevenson, Allan C. Wechsler, and others, Postings to Math Fun mailing list, April 2021.

Links

• W. Edwin Clark, Table of n, a(n) for n = 0..63 [The trajectory to the first prime.]

Crossrefs

Cf. A084317, A056938, A084318, A343156.

Programs

Mathematica

NestList[FromDigits@ Flatten@ IntegerDigits@ Map[First, FactorInteger@ #] &, 91, 17] (* Michael De Vlieger, Mar 25 2017 *)

Extensions

Example corrected by Rémy Sigrist, Apr 07 2021