|
|
A135843
|
|
Prime numbers p of the form 10k+1 for which the pentanacci quintic polynomial x^5-x^4-x^3-x^2-x-1 modulus p is factorizable into five binomials.
|
|
6
|
|
|
691, 8311, 11731, 17291, 25111, 34421, 40531, 41131, 44971, 47521, 51341, 64891, 70111, 74161, 75991, 76261, 86441, 88471, 99611, 106121, 110251, 112121, 117671, 118171, 133241, 139661, 145451, 156941, 161591, 161641, 164051, 164471, 167071, 172871, 175631, 184291, 194981, 199961, 200171
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
According to class field theory each quintic polynomial is completely reducible modulo some prime number p of the form 10k+1.
|
|
REFERENCES
|
S. Kobayashi & H. Nakagawa, Resolution of Solvable Quintic Equation, Math. Japonica Vol. 87, No 5 (1992), pp. 883-886.
|
|
LINKS
|
|
|
MATHEMATICA
|
a = {}; Do[If[PrimeQ[10n + 1], poly = PolynomialMod[x^5-x^4-x^3-x^2-x-1, 10n + 1]; c = FactorList[poly, Modulus -> 10n + 1]; If[Sum[c[[m]][[2]], {m, 1, Length[c]}] == 6, AppendTo[a, 10n + 1]]], {n, 1, 10000}]; a
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|