Name: 這支鉛筆竟然有24位數字？！😱 (This pencil has a 24-digit number)
Uploaded: 2025-12-30T16:58:08.000Z
Duration: 5 min 13 s

過去簡單式

James was given a pencil with the number 357-6863-126462-16567, 629137 stamped on it.

James 拿到一支鉛筆，上面印著號碼 357-6863-126462-16567，629137。

James was given a pencil with the number 3576-863126-46216-567-629137 stamped on it.

James 拿到一支鉛筆，上面印著號碼 3576-863126-46216-567-629137。

You said it too fast for me to be able to write it down so that I can look at it for, like, 10 minutes and just, like, be sad.

你說太快了，我來不及抄下來，這樣我就能看著它，然後，嗯，難過個 10 分鐘。

哦，是 3576-8631-2646-2165-67-629137。

I would not have read that number so fast if you needed to memorize all of it, but

如果你需要記住全部，我絕對沒辦法這麼快唸出這個數字，但是

I was just going through the list of primes, and

I hit that well, so I know it didn't end on an even number.

我碰到了那個，所以我知道它沒有以偶數結束。

I was just thinking of, like, what's a notable large number?

我當時在想，有什麼比較大的數字比較特別？

At first I was like, maybe this is, like.

一開始我還想，也許這是，像是。

I was gonna be like, it's the millionth pencil made.

我本來想說，這是第一百萬支鉛筆。

Was it the person who discovered this prime or who.

Or were they using it to cheat on a test?

我當時在想，他們為什麼選這個？

Or is this someone being cheeky writing this somewhere?

還是有人在惡作劇把它寫在這裡？

Sometimes prime numbers are used in, like, password protection and stuff like that.

有時候質數會用在，像是密碼保護之類的。

Prime is definitely the fact to clue in on here.

My assumption was that this was either found or, like, used in some formula or discovery.

我的假設是這個東西是被發現的，或是在某個公式或發現裡被使用。

And so this is sort of like a celebration pencil.

所以這有點像是一個慶祝鉛筆。

Like, everyone who worked on the paper got this pencil as a gift.

像是，所有參與這篇論文的人都收到這支鉛筆當禮物。

Is this for celebration, or is this like, Caroline is saying, like, being used in a silly way, like, to cheat on a test or something?

這是為了慶祝，還是像 Caroline 說的，被用在很奇怪的地方，像是作弊考試什麼的？

But you're starting to think in the right area there.

但你已經開始往對的方向思考了。

Matt Parker might get this if it's like, oh, it's your 10th year anniversary, so this is the 10th biggest prime or something like that.

Matt Parker 可能會猜到，如果它是，喔，這是你們的十週年紀念，所以這是第十大的質數之類的。

James, in the question is James Grime, who you might recognise from Numberphile and who.

James，問題裡是 James Grime，你可能在 Numberphile 上認識他，而且他。

Who I actually know from uni, from way back, like.

我其實從大學就認識他了，很久以前，像是。

He's done a video about this on Numberphile.

他有在 Numberphile 上做過關於這個的影片。

There's a part of this question you haven't even talked about yet.

這個問題裡有一部分你還沒講到。

I got so lost on the number that I don't know if I heard anything else.

我對那個數字實在是太迷失了，我不知道我還有沒有聽到其他東西。

James was given a pencil with the number 3576-8631-2646-2656-76-29137 stamped on it.

James 拿到一支筆，上面印著數字 3576-8631-2646-2656-76-29137。

因為你不能在太空中使用原子筆。

喔，如果這是原子筆就沒辦法了。

As you sharpen a pencil, does it stay a prime number?

當你削鉛筆時，它還是質數嗎？

Tom Lum and Ella, when you said the largest prime.

Tom Lum 和 Ella，當你們說最大的質數時。

It is the largest prime that has that property.

它是具有這個性質的最大質數。

You cannot add another number on the left of it.

你不能在它的左邊加上另一個數字。

When you said you only need the start and the end, you actually only need the end.

當你說你只需要開頭和結尾時，其實你只需要結尾。

So as you sharpen, the leper numbers keep getting removed, Keep getting removed and you end up with 9137, which is prime.

所以當你削鉛筆時，孤獨數會不斷被移除，不斷被移除，最後剩下 9137，它是質數。

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這支鉛筆竟然有24位數字？！😱 (This pencil has a 24-digit number)

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