id:A140745 - OEIS Search Results

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Smallest prime p such that p-th Mersenne number A000225(p) = M_p = 2^p - 1 has prime decomposition into exactly n factors.

+0
1

2, 11, 29, 157, 113, 223, 491, 431, 397 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 223, pp 63-4, Ellipse Paris 2008.`
	CROSSREFS	`Sequence in context: A086252 A106926 A133558 this_sequence A062802 A103830 A162260` `Adjacent sequences: A140742 A140743 A140744 this_sequence A140746 A140747 A140748`
	KEYWORD	`more,nonn`
	AUTHOR	`Lekraj Beedassy (blekraj(AT)yahoo.com), Jul 12 2008`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.