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A057484 Numbers n such that x^n + x^5 + x^4 + x^3 + x^2 + x + 1 is irreducible over GF(2). 0
7, 8, 12, 14, 16, 17, 18, 19, 21, 23, 36, 37, 42, 61, 88, 112, 147, 171, 239, 253, 302, 304, 333, 402, 472, 597, 619, 718 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

MATHEMATICA

Do[ If[ ToString[ Factor[ x^n + x^5 + x^4 + x^3 + x^2 + x + 1, Modulus -> 2 ]] == ToString[ x^n + x^5 + x^4 + x^3 + x^2 + x + 1 ], Print[ n ]], {n, 0, 750} ]

CROSSREFS

Sequence in context: A050796 A106630 A050798 * A050901 A105832 A059177

Adjacent sequences:  A057481 A057482 A057483 * A057485 A057486 A057487

KEYWORD

nonn,more

AUTHOR

Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 27 2000

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Last modified February 17 11:18 EST 2012. Contains 206011 sequences.