1531/4157

[Cabbage]

I bet you're right. I wonder if Rowling put them in or the developer? Before, I just suspected that they were house numbers or birthdays of someone Rowling knew. If they're both prime numbers, that suggests someone with a mathematical mind came up with them.
I think it's supposed to LOOK like a power meter. Where do British houses usually keep the power meter?

[GoldSpirit104]

well I googled it up , Many people notice it too -.- yet they dont know what it means. Love JK Rowling xD she always have something to make us think ^_^

[Extractum11]

pottermore.com/1351 redirects to the homepage...but pottermore.com/4157 looks suspicious
I'm not sure what a Gateway is, maybe someone that's received their welcome email could tell us?

[MoonLight166]

I've got early access, and the Gateway is the main Pottermore page after you log in. It's the gate image from the trailer with the paper cutouts and provides quick links to each book and each chapter of each book.

When I try to put either 1531 or 4157 at the end of the pottermore url, it directs me to the "sorry, this page has vanished" message telling me to go back to the Gateway.

[Extractum11]

Looks like I got too excited... if you type pottermore.com/somethingrandom it goes to the homepage, but if you type www.pottermore.com/somethingrandom it goes to the error page, so when I saw that 1457 took me somewhere different I thought it meant something...sorry about that

[MirrorCat43]

1+5+3+1 = 10
4+1+5+7 = 17
17-10=7
Also, the series began when Harry was 10 and ended when he was 17...
I don't know if this means anything, or not.
(I was thinking of Arithmancy when I decided to add everything, so if you continue with that...
1+0=1 and 1+7=8, 8-1=7)

[dawnblood110]

I typed the string of eight numbers on her website (on the phone used for the easter egg codes) and nothing... I was almost sure another video from Jo was going to pop up xP

[MonStar]

I apologize in advance for my English.

I typed on my phone 2626 (4157-1531), 5688 (4157+1531) and 6364367 (4157x1531) and got these words: Coco, Knut and Members.
I searched for Knut but found nothing and I'm not sure about coco (it wasn't in the kitchen) and really don't know which members are they mean.

[MerryLore]

Someone said that, if you have 3 cauldrons, you can type this at the end of the url when you're brewing a potion and be able to brew 3 potions at a time, but I'm suspicious of this and no one has tried it yet, to my knowledge.

[treble.maker]

That would be awesome! Sounds like it could be a rumor, but it's worth a shot. I'll have to try later, thanks Merry!