When you see a random PLU number and/or a bar code number in the grocery store and wonder if it is prime.

When you see a random PLU number and/or a bar code number in the grocery store you write it down and run primality test when you arrive home.

[QUOTE=edorajh]When you see a random PLU number and/or a bar code number in the grocery store you write it down and run primality test when you arrive home.[/QUOTE]You memorize all primes up to 99999, so you can do this in your head.

[QUOTE=Uncwilly]You memorize all primes up to 99999, so you can do this in your head.[/QUOTE]

Don't you mean up to 99,991, since that is the last five digit prime number. Unfortunately, there are 9,592 primes in all, and 9,592 is not prime. However, for those who want to memorize them all, the complete list is attached below.

you turn off half your crunching farm to keep your room at an almost unbarable temp

[QUOTE=StarQwest] I have a LL test on M35,338,627 finishing in less than five days! Wish me good luck.[/QUOTE]

Just for the record, this number came up composite. Boo. However, I have another one (M35,293,373) finishing in two days. Maybe I'll get lucky.

[QUOTE=moo]you turn off half your crunching farm to keep your room at an almost unbarable temp[/QUOTE]

Turning off part of your farm?! Unthinkable!

...you turn all of your computers back on and because it gets too hot, you sleep outside on the street.

My room is usually at around 85 to 90 degrees, but I refuse to ever shut down the computer (to cool things down) because it would then take longer to finish my iterations.

... you suddenly become very concerned about global warming after the latest heat wave causes 20 of your CPUs to burn.

With my job, I have access to carbonic ice. I was wondering if putting a few ice cubes in my tower can help to shut down a bit my awful summer-full-speed cpu fan during the night...and the smoke it emits during sublimation is so pretty...

but in fact, I think I won't play with carbonic ice near my bed...when collegues are playing with kilograms of it in a sink half full of HOT water, it is very funny but I always fear the risk of suffocation linked to the very large amount of CO2 emitted!
One of the point I like when I go to bed, is the good probability that I'll wake up in the morning...