# Primes

## Recommended Posts

2503

2531

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2539

A little skiff racing anyone?  hmmmm @DuoDex?

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2543

Edited by Green Baron

2549

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2557

(big image)

Edited by Green Baron

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2579      Gap of 22!   Followed by another!  Who wants it!? Nevermind, I'm bad at simple math at times.

BAM !!!

2591

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Disregarding Triop's post…

Gap of _2_. Take that!

Train pic:

2609

2615

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Welcome to the forum !

And ... nope on first sight 2615 is divisable by 5 (and maybe others). Want to try again ?

Spoiler

Edit: a quick&dirty and terribly ineffective C function to check if n is prime:

```
static inline int isPrime( int n ) {
if( 0 == ( n % 2 ) )
return 0;
if( 0 == ( n % 3 ) )
return 0;
if( 0 == ( n % 5 ) )
return 0;
int l = n/2;
for( int c = 7; c <= l; c += 2 ) {
if( 0 == ( n % c ) ) {
// printf( "%d is divisable by %d\n", n, c );
return 0;
}
}
return 1;
}```

Edited by Green Baron

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2621

*scratchhead* Are they meant to be for humans ? My toes hurt just from looking at these ...

Edited by Green Baron

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2 hours ago, Green Baron said:

*scratchhead* Are they meant to be for humans ? My toes hurt just from looking at these ...

I’d do anything for fashion

Back on track...

2633 (it’s a little bit hard to find)

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Track ? Ay !

2647

How they all look towards the camera. Even the doggy .... :-)

Edited by Green Baron

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2657

Gap of 10

Edited by PunkyFickle
Gap of 10

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Ok... assuming we're back on track after the couple misdirections up there....

Sigh.... fine, another train

2659

2663

2671

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And now for something completely different:

2677

2683

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