A078814 - OEIS

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A078814

Smallest prime factor of Googolplex - n which exceeds 16.

17, 1433, 499679, 1279, 31, 149 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	LINKS	`Dario Alejandro Alpern, Factors of 1000 numbers up to googolplex.`
	MATHEMATICA	`(* For any individual n *) k = 17; While[ !PrimeQ[k] \|\| PowerMod[10, 10^100, k] - n != 0, k += 2]; k`
	CROSSREFS	`Cf. A072288.` `Sequence in context: A007410 A203229 A072160 * A129911 A104808 A061686` `Adjacent sequences: A078811 A078812 A078813 * A078815 A078816 A078817`
	KEYWORD	`hard,nonn,more`
	AUTHOR	`Ed Pegg, Jr. (edp(AT)wolfram.com) and Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 06 2002`
	EXTENSIONS	`Seventh term is not known. Sequence continues ?, 625392489737, 19, 37, 5419, 107, 23, 60149, 1733, 89, 8543, 17, 5261, 229, 8656871, 4273, 14009, 29, 509, 43628661784403, 24539783, 19, 347, 12414692011, 523, 151, 421, 35816135619181, 17, 23, 184309, ?, 181, 288481, 163, 41, 743, 13337, 71, 53, 19, 59, 113, 37957721, ... where the unknown numbers exceed 25 x 10^12. - Dario Alejandro Alpern (alpertron(AT)hotmail.com), Jul 03 2003`

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Last modified February 15 13:40 EST 2012. Contains 205803 sequences.