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A003260 Largest factor of Mersenne numbers.
(Formerly M2693)
+0
9
3, 7, 31, 127, 89, 8191, 131071, 524287, 178481, 2089, 2147483647, 616318177, 164511353, 2099863, 13264529, 20394401, 3203431780337, 2305843009213693951 (list; graph; listen)
OFFSET

1,1

REFERENCES

J. Brillhart et al., Factorizations of b^n +- 1. Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 2nd edition, 1985; and later supplements.

LINKS

T. D. Noe, Table of n, a(n) for n=1..95 (derived from Brillhart et al.)

J. Brillhart et al., Factorizations of b^n +- 1, Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 3rd edition, 2002.

C. K. Caldwell, Mersenne primes

S. S. Wagstaff, Jr., The Cunningham Project

CROSSREFS

Cf. A001348.

Cf. A016047, A046800

Sequence in context: A103901 A089162 A016047 this_sequence A138865 A051281 A138864

Adjacent sequences: A003257 A003258 A003259 this_sequence A003261 A003262 A003263

KEYWORD

nonn,nice

AUTHOR

njas

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.


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