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Development of Algorithmic Constructions

11:29:01 20.Apr 2024

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Polynom = x^2-44x-3

1. Algorithm

a:=1;
b:=-44;
c:=-3;


liste_max:=100000;

sieving:=proc (stelle, p)
begin
   while (stelle<=liste_max) do
     erg:=liste[stelle];
     while(erg mod p=0) do
        // Divison of the stored f(x) by the prime
        erg:=erg /p;
     end_while;
     liste[stelle]:=erg;
     stelle:=stelle+p;
   end_while;
end_proc;

// Calculation of the values of the polynom for x from 0 to liste_max
for x from 0 to liste_max do
   p:=abs (a*x^2+b*x+c);
   while (p mod 2=0) p:=p/2;
   liste [x]:=p;
end_for;

for x from 0 to liste_max do
    p:=liste[x];

    if (p>1) then

      // Printing the Primes
      print (x, p);

      // 1. Sieving
      sieving (x+p,  p);

      t:=(-x-b/a) mod p;
      if t=0 then t:=p; end_if;

      // 2. Sieving
      sieving (t, p);

    end_if;

end_for;

 2. Mathematical background
Lemma: If p | f(x) then also p | f(x+p) and  p | f(-x-b/a)

a)  p | f(x)   <=> ax^2 + bx + c = 0                       mod p
    p | f(x+p) <=> a(x+p)^2 + b(x+p) + c = 0               mod p
               <=> ax^2 + 2axp + ap^2 + bx + bp + c = 0    mod p
               <=> ax^2 + bx + c = 0                       mod p

    Thus if p | f(x) then p | f(x+p)

b)  if b = 0 mod a
    p | f(x)       <=> ax^2 + bx + c = 0                         mod p
    p | f(-x-b/a)  <=> a(-x-b/a)^2 + b(-x-b/a) + c = 0           mod p
                   <=> ax^2 + 2bx + b^2/a - bx - b^2/a + c = 0   mod p
                   <=> ax^2 + bx + c = 0                         mod p

    Thus if p | f(x)  then p | f(-x-b/a)



 3. Correctness of the algorithm
The proof for this polynom is similar to the proof for the polynom f(x)=x^2-4x+1.

a) First terms for the polynom f(x) = x^2-44x-3

f(0)=3
f(1)=23
f(2)=29
f(3)=7
f(4)=163
f(5)=11
f(6)=1
f(7)=131
f(8)=97
f(9)=53
f(10)=1
f(11)=61
f(12)=43
f(13)=1
f(14)=47
f(15)=73
f(16)=41
f(17)=1
f(18)=157
f(19)=239
f(20)=1
f(21)=1
f(22)=487
f(23)=1
f(24)=1
f(25)=1
f(26)=1
f(27)=1
f(28)=1
f(29)=1
f(30)=1
f(31)=1
f(32)=1
f(33)=1
f(34)=1
f(35)=1
f(36)=1
f(37)=1
f(38)=1
f(39)=1
f(40)=1
f(41)=1
f(42)=1
f(43)=1
f(44)=1
f(45)=1
f(46)=89
f(47)=1
f(48)=1
f(49)=1
f(50)=1
f(51)=59
f(52)=1
f(53)=79
f(54)=179
f(55)=1
f(56)=223
f(57)=1
f(58)=809
f(59)=1
f(60)=1
f(61)=1
f(62)=1
f(63)=199
f(64)=1277
f(65)=227
f(66)=1
f(67)=769
f(68)=181
f(69)=1
f(70)=1
f(71)=1
f(72)=1
f(73)=151
f(74)=739
f(75)=1
f(76)=347
f(77)=1
f(78)=883
f(79)=1381
f(80)=137
f(81)=499
f(82)=283
f(83)=1
f(84)=373
f(85)=1741
f(86)=401
f(87)=1
f(88)=1
f(89)=1
f(90)=197
f(91)=2137
f(92)=1471
f(93)=1
f(94)=1
f(95)=269
f(96)=1663
f(97)=367
f(98)=1
f(99)=907

b) Substitution of the polynom
The polynom f(x)=x^2-44x-3  could be written as f(y)= y^2-487 with x=y+22

c) Backsubstitution

Beside by backsubstitution you get an estimation for the huge of the primes with p | f(x) and p < f(x)

f'(y)>(2y-1) with with y=x-22
f'(x)>2x-45  with x > 22

4. Infinity of the sequence

5. Sequence of the polynom with 1

6. Sequence of the polynom (only primes)

7. Distribution of the primes

8. Check for existing Integer Sequences by OEIS

Found in Database : 3, 23, 29, 7, 163, 11, 1, 131, 97, 53, 1, 61, 43, 1, 47, 73, 41, 1, 157, 239,
Found in Database : 3, 23, 29, 7, 163, 11, 131, 97, 53, 61, 43, 47, 73, 41, 157, 239, 487,
Found in Database : 3, 7, 11, 23, 29, 41, 43, 47, 53, 59, 61, 73, 79, 89, 97, 131, 137,