The You Game!

[DesLife]

< just made a program on Maple that calculates the number of prime numbers between 1 and 1000000000. < wonders how long it'll take ahahah. (< has already done that between 1 and 1000000, and if < recalls correctly, 7% of those numbers are prime numbers, that's quite a lot)

[spiraldoor]

<’s favourite prime number is 5

[MLII]

< says 5 is an awesome number

< says he was a bit of a gay stitchpunk though

[Danone]

< prefer the number 4
< re-saw star wars

[Puruun]

< is looking forward to tomorrow~

[Matyuv]

< just made a program on Maple that calculates the number of prime numbers between 1 and 1000000000.

< coded that up too.
< wonders how long it'll take to execute.

[DesLife]

On what software ? It's been over an hour now. < expects it to take days, since it's an old version of Maple. Remember <'s Euler stuff program ?

[Matyuv]

On what software ?

MS Visual Studio 2008 (C++)

From 1 to 1 million took 0.59secs on <'s computer
From 1 to 1 billion will take ages though.

[DesLife]

... 0.59S ??! It took 18.3s on <'s computer...

[Matyuv]

Hmmm that's strange. What's your processor and what algorithm are you using?

[DesLife]

m:=0: for i from 1 to 1000000 do if isprime(i)=true then m:=m+1: fi: od: m;
Proc : Intel(R) Core(TM)2 Duo CPU T6500, 2.10GHz

< absolutely doesn't know anything about processors ahahah.

Oh, and <'s using Maple 5.1, which is old. Maple 7, which we use at school, is much faster.

[Matyuv]

That's a laptop processor right?
Mine's Intel Core i5 750 @ 2.67GHz, but I doubt it's 30 times faster than yours... must be Maple (then again I doubt their isprime() function is less efficient than the one I wrote)

< doesn't know shit about processors or hardware in general too actually lel

[DesLife]

Yup, right. What's your function ?

[Matyuv]

It was for some ProjectEuler problem originally.

Code: Select all

bool is_prime(int n)
{
	int start = 5;
	if (n==1)   return false;
	if (n<4)    return true;
	if (n%2==0) return false;
	if (n<9)    return true;
	if (n%3==0) return false;
	while (start <= sqrt((double)n))
	{
		if (n%start==0) return false;
		if (n%(start+2)==0) return false;
		start += 6;
	}
	return true;
}

[MLII]

Maple 7, which we use at school, is much faster.

School? :0

< wonders how old Des is

[Serza5]

< knows Dessy is 25 and a maths teacher

[Julia_Patti]

<draws a sig for Candish (which won't be in Ambush thread, because it was discussed before and therefore not a surprise).

[Matyuv]

< has to study for the programming exam which I want to retake tomorrow but it's so boring...

[Julia_Patti]

<...already waits for Candy's reaction
<has finally learned how to animate fully in GIMP. Phew!..

[Matyuv]

< wanted to retake an exam today but < overslept