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Search: id:A073639
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| A073639 |
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Numbers n such that x^n + x + 1 is a primitive irreducible polynomial (mod 2). |
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+0 7
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| 2, 3, 4, 6, 7, 15, 22, 60, 63, 127, 153, 471, 532, 865, 900, 1366
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OFFSET
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1,1
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COMMENT
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The next irreducible polynomials of this form up to 10^4 are at n = 2380, 3310, 4495, 6321, 7447. n = 2380 and 3310 are not primitive, so the next term is >= 4495.
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REFERENCES
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I. F. Blake, S. Gao and R. J. Lambert, "Constructive problems for irreducible polynomials over finite fields", in Information Theory and Applications, LNCS 793, Springer-Verlag, Berlin, 1994, 1-23, See Table 2.
N. Zierler, On x^n+x+1 over GF(2). Information and Control 16 1970 502-505.
N. Zierler, Primitive trinomials whose degree is a Mersenne exponent. Information and Control 15 1969 67-69.
N. Zierler and J. Brillhart, On primitive trinomials (mod 2). Information and Control 13 1968 541-554.
N. Zierler and J. Brillhart, On primitive trinomials (mod 2), II. Information and Control 14 1969 566-569.
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LINKS
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Joerg Arndt, Fxtbook
R. P. Brent, Searching for primitive trinomials (mod 2)
R. P. Brent, S. Larvala and P. Zimmermann, A fast algorithm for testing reducibility of trinomials ..., Math. Comp. 72 (2003), 1443-1452.
Index entries for sequences related to trinomials over GF(2)
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CROSSREFS
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Cf. A002475, A073571, A057486.
Sequence in context: A039947 A096477 A039059 this_sequence A130776 A077292 A036413
Adjacent sequences: A073636 A073637 A073638 this_sequence A073640 A073641 A073642
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KEYWORD
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nonn,nice
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AUTHOR
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Richard Brent and Paul Zimmermann, Sep 05, 2002.
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