Project Euler Forum

The problem says nothing about x. It may have the same digits as 2x,3x,4x,5x and 6x or not. That's absolutely irrelevant.

Last visit: Tuesday, 24th May 2016, 04:00 pm
This means we didn't change anything to your password.
So if you can remember it it should work. Please think hard to remember...

Yes, it concerns all publishing outside Project Euler. If you want to save your solutions you can do so locally on your computer, usb stick or external hard drive. Alternatively you can make your github repo private. Public repos, blogs etc are not allowed. The about page and the message you see whe...

In the big pink box at the top of the page it reads:

'Don't ask for hints how to solve a problem'

You're being asked to decrypt the given message. As answer you must give the sum of the ascii values of the decrypted text.
Easier we can't state it.

The order of the last sentence of Problem 81 (View Problem), Problem 82 (View Problem) and Problem 83 (View Problem) has been changed in order to address the possible confusion rows vs columns in #082.

Junglemath wrote: ↑

Fri Oct 18, 2019 10:13 am

Why are you assuming that English isn't my first language?

Is it then?

A few things must be made clear: The projecteuler.chat forum (that's the forum you are reading now) is an out of the box forum. It uses phpBB. We can't change that forum to accomodate for requests. The main site projecteuler.net is written by Colin Hughes himself. Reasonable request can be catered f...

Perhaps it's good to add that "integral" can also be a noun.
E.g the concept of an integral in Calculus (an antiderivative used to calculate an area and other uses) .
However, in the wording of problem 94 'integral' is an adjective.

Hello, I have two issues/bugs: 1. I have solved 100 problems already, but if I check my position in statistics/locations it says I only solved 99 problems, is it a sync issue? Yes, I think so. Should be OK now. 2. I got the "On The Ball" badge even though I didn't deserve it, can you remove it plea...

On Tue, 16 Sep 2014, 02:48.47 avic successfully generated an account recovery key.
They should have stored that somewhere in a safe place.
This is the one and only way to recover the account avic.

The problem isn't about adjacent numbers but about adjacent digits.

Problem seems to be fixed now.

Unfortunately the applet is in Java. Many browsers don't even tell you that they don't support Java any more.
At the time the problem was published in 2011every browser supported Java.
So alas, for you nothing to be viewed.

amagri wrote: ↑

Tue Aug 20, 2019 8:19 pm

Hi Euler team!

This message to inform you that I encountered a bug or at least strange behaviors on the Euler website.

I sent you a PM.

amagri wrote: ↑

Tue Aug 20, 2019 9:16 pm

Hi Euler team!

This message to inform you that I encountered a bug or at least strange behaviors on the Euler website.

I sent you a PM.

According to Wikipedia Common Lisp is a dialect of Lisp.
So please use LISP.

I'm having quite a lot of problem with the upper bound of 10^14. Was the upper bound of this problem ever increased? No Even using a bitwise sieve, i have problems even allocating that much. Probably some better way to do it without a huge sieve then. Perhaps you have to invent another approach tha...

Thanks,
Looks great.

I think it best if all pinned problems appear together.