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atkins.lib ist not usable.

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[quote="OleksandrIenaUnregistered"]Output of "example Atkin;" from "atkins.lib"; [code] >example Atkin; // proc Atkin from lib atkins.lib EXAMPLE: ring R = 0,x,dp; Atkin(7691,100,5); -1 Atkin(3473,10,2); -1 printlevel=1; Atkin(10000079,100,2); Set i = 0, n = 0 and N(i) = N(0)= 10000079. pause> List H of possibly suitable discriminants will be calculated. H = -3,-4,-7,-8,-11,-12,-15,-16,-19,-20,-23,-24,-27,-28,-31,-32,-35,-36,-39,-40,-43,-44,-47,-48,-51,-52,-55,-56,-59,-60,-63,-64,-67,-68,-71,-72,-75,-76,-79,-80,-83,-84,-87,-88,-91,-92,-95,-96,-99,-100,-103,-104,-107,-108,-111,-112,-115,-116,-119,-120,-123,-124,-127,-128,-131,-132,-135,-136,-139,-140,-143,-144,-147,-148,-151,-152,-155,-156,-159,-160,-163,-164,-167,-168,-171,-172,-175,-176,-179,-180,-183,-184,-187,-188,-191,-192,-195,-196,-199,-200 pause> N(0) = 10000079 is divisible by 5. pause> N(0) = N = 10000079 and therefore N is not prime. pause> -1 > [/code] In particular 10000079 should be a prime number, the message "10000079 is divisible by 5" is noncence. The reason for the problem is the usage of "a mod b" with number type. [code] > ring r =0, x, dp; > 10000079 mod 5; 4 > number(10000079) mod 5; 0 > [/code] I suppose the problem with the library exists since years. :([/quote]

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Topic review - atkins.lib ist not usable.

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hannes

Post subject:

Re: atkins.lib ist not usable.

atkins.lib is now removed

Posted: Wed Jul 14, 2021 8:39 pm

OleksandrIenaUnregistered

Post subject:

atkins.lib ist not usable.

Output of "example Atkin;" from "atkins.lib";

Code:

>example Atkin;
// proc Atkin from lib atkins.lib
EXAMPLE:
    ring R = 0,x,dp;
    Atkin(7691,100,5);
-1
    Atkin(3473,10,2);
-1
    printlevel=1;
    Atkin(10000079,100,2);
Set i = 0, n = 0 and N(i) = N(0)= 10000079.
pause>

List H of possibly suitable discriminants will be calculated.
H = -3,-4,-7,-8,-11,-12,-15,-16,-19,-20,-23,-24,-27,-28,-31,-32,-35,-36,-39,-40,-43,-44,-47,-48,-51,-52,-55,-56,-59,-60,-63,-64,-67,-68,-71,-72,-75,-76,-79,-80,-83,-84,-87,-88,-91,-92,-95,-96,-99,-100,-103,-104,-107,-108,-111,-112,-115,-116,-119,-120,-123,-124,-127,-128,-131,-132,-135,-136,-139,-140,-143,-144,-147,-148,-151,-152,-155,-156,-159,-160,-163,-164,-167,-168,-171,-172,-175,-176,-179,-180,-183,-184,-187,-188,-191,-192,-195,-196,-199,-200
pause>

N(0) = 10000079 is divisible by 5.
pause>

N(0) = N = 10000079 and therefore N is not prime.
pause>

-1

> 

In particular 10000079 should be a prime number, the message "10000079 is divisible by 5" is noncence.

The reason for the problem is the usage of "a mod b" with number type.

Code:

> ring r =0, x, dp;
> 10000079 mod 5;
4
> number(10000079) mod 5;
0
> 

I suppose the problem with the library exists since years.

Posted: Sat Jun 19, 2021 12:47 pm

It is currently Fri May 13, 2022 10:54 am

Singular

atkins.lib ist not usable.

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