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atkins.lib ist not usable. https://www.singular.uni-kl.de/forum/viewtopic.php?f=10&t=2953 |
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Author: | OleksandrIenaUnregistered [ Sat Jun 19, 2021 12:47 pm ] |
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. |
Author: | hannes [ Wed Jul 14, 2021 8:39 pm ] |
Post subject: | Re: atkins.lib ist not usable. |
atkins.lib is now removed |
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