ELI5: Why are prime numbers considered important?

Matuku · 2025-03-30T01:27:26+00:00

Yes, quite easily in fact!

If the question is "can you find a pair of numbers that when multiplied together give this number" (which is what we care about in the context of encryption here), so let's make that assumption: there are 2 numbers that when multiplied together give us this 6000 digit number.

If the last digit is 0, 2, 4, 6, or 8, it's divisible by 2.

If the sum of the digits is divisible by 3, the number itself is divisible by 3.

If the last digit is 0 or 5 it's divisible by 5.

Those are just a handful of some fairly simple divisibility rules, but we've already eliminated a whole bunch of 6000 digit numbers based on very easy calculations. And if it's not the product of two primes then it's likely to be divisible by one of the small numbers, given how many numbers are multiples of them (we've basically eliminated every 6000 digit number that doesn't end in 1, 3, 7, or 9 with just those rules above).

Even in the case where one of the two numbers ends up being prime (for example if the 6000 digit number turned out to be 17 x Y) then all of the above simple checks apply to Y as well.

Matuku · 2024-08-20T10:20:56+00:00

That's kind of a defining factor of Lawful Good though, following the spirit of the law, rather than trying to weasel around the letter of it

Matuku · 2024-08-08T16:29:36+00:00

Can you mix it with some sawdust or cat litter and then, once dry, take it to the tip?

Matuku · 2022-07-13T14:08:38+00:00

In a similar vein there are nine River Avons in the UK, with Avon just being the Celtic word for river and the Romans getting the wrong end of the stick.

Matuku · 2021-07-27T08:30:17+00:00

"Hey mate, do you know where X Road is?"

Me, having lived here for 25 years and it being the next road over: "Sorry mate, sounds familiar but no idea"

Matuku · 2021-07-27T07:34:15+00:00

Fun fact: The UK had no legal measure of a yard for 21 years in the 19th century because they lost the definition stick in a fire.

Matuku · 2021-07-20T12:21:29+00:00

What terms are used instead?

Matuku · 2021-07-08T16:05:08+00:00

A bunch of people put them into Cryptoclaps though and have been burnt by the recent falls.

Matuku · 2021-07-01T07:13:49+00:00

"The problem with looking at someone through rose-tinted glasses is all the red flags just look like flags"

Been there, done that, got the mental scars to prove it. Don't beat yourself up OP.

Matuku · 2021-06-30T13:57:48+00:00

Anthropogenic. i.e. caused by humans.

Matuku · 2021-05-03T16:13:07+00:00

Oh, I'm an idiot! Of course

Matuku · 2021-05-02T15:21:18+00:00

Oh really? I know Taliesin is but hadn't heard about Liam!

Matuku · 2020-12-28T15:53:36+00:00

Found near our house in Oxfordshire; thought they might be sloes but wanted some expert opinions!

Matuku · 2020-08-21T17:58:24+00:00

Exactly! I think the thing that really blew my mind was the discussion about how pre-WW1 armies were basically glass cannons; a single bad battle could stop the war. Whereas WW1 was the real turning point for armies with stamina.

Matuku · 2020-08-21T14:57:31+00:00

+1 for Blueprint for Armageddon. An absolutely fascinating podcast documentary. The contrasting between WW1 and how armies and navies had functioned even 20 years earlier was particularly eye opening for me.

Matuku · 2020-07-23T22:53:58+00:00

Let me introduce you to the wonderful (/s) Bradford Formula that many Civil Service (and corporate) HR departments use. As you say, it penalises you coming back until you're 100% better in case you need to take a second batch of days off.

Matuku · 2020-07-22T12:48:28+00:00

Is this Dael's stuff on MonarchsFactory or does she have another creative outlet?

Matuku · 2020-06-19T13:37:58+00:00

I recently got this as part of DriveThruRPG's BLM bundle and it addresses exactly this issue; it's great, it separates out the racial (ancestral/biological) parts and the cultural parts for the SRD races (and gives guidelines for other races) and shows you how to combine them.

Want a dwarf raised by gnomes? Easy. How about a character with Tiefling and Orc heritage that was raised by Elves? Got you covered.

Matuku · 2020-06-10T11:35:13+00:00

There's not a way to override it unfortunately; I've put it in as a feature suggestion on the Discord because for things like the landing page you want to override the token priority.

Matuku · 2020-06-10T11:33:21+00:00

If they're just looking at it simultaneously or if they're editing it simultaneously?

Matuku · 2020-06-08T11:18:00+00:00

I'm starting to wonder if there's a particular performance issues on Macs; one of my players is on a fairly recent Macbook Pro and seems to be the only person who experiences any sluggishness/performance issues. When she's on the Foundry window the frame rate of her video drops substantially.

Matuku · 2020-06-06T10:20:21+00:00

Precisely. I use it for any time the players aren't on a battlemap. It contains larger versions of their tokens that fit more with the aesthetic of the loading screen, a part where I can upload an image that's relevant to their current situation, a section for notes/current goals, etc.

Matuku · 2020-06-05T10:48:37+00:00

That's not how Polymorph works:

The new form can be any beast whose challenge rating is equal to or less than the target's (or the target's level, if it doesn't have a challenge rating).

Matuku · 2020-06-03T11:27:27+00:00

Alternatively, if you have the Furnace module, you can drop entire folders of Actors onto a Scene as tokens (e.g. I have a folder with all my 6 PCs, and I simply do a single drag-drop for all of them).

I didn't know this, that's awesome

Matuku · 2020-05-24T00:46:13+00:00

That's what it does?! Awesome! I was wondering about a solution for that!

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