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Author Topic: The Walrii Prime  (Read 396 times)

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Offline Juju

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The Walrii Prime
« on: September 08, 2017, 10:11:41 pm »
I just found a pretty interesting prime here:

Code: [Select]
222227772222222222222222222272227277222222222222222722222722722222222222227227727222272222222222227272277722227722222222227722272272227272222222227722272227227227222222272272272227272227222222272227727272722222722222772722222777222222722222727772272222222222722222722727772222222222272222722722272222222222272222722722272222222222272222722722272222222222272222727722272222222222272222727772722272222222227222727272722722272222227722727772722222227222222772277272722222222722722722277227222722222722722272272222777272222272272227272277222777722277727772277722222222277772222777
Or, if you rearrange it in a square:

222227772222222222222222
222272227277222222222222
222722222722722222222222
227227727222272222222222
227272277722227722222222
227722272272227272222222
227722272227227227222222
272272272227272227222222
272227727272722222722222
772722222777222222722222
727772272222222222722222
722727772222222222272222
722722272222222222272222
722722272222222222272222
722722272222222222272222
727722272222222222272222
727772722272222222227222
727272722722272222227722
727772722222227222222772
277272722222222722722722
277227222722222722722272
272222777272222272272227
272277222777722277727772
277722222222277772222777


As far as I know, this 576-digit number is prime (or have high probabilities to be prime according to the GNU Multiple Precision (GMP) library, someone should independently verify if you have a copy of Mathematica or something just checked with Wolfram Cloud, it's prime). Now if you want to Ctrl-F this page and search for 7...

(click to show/hide)

Of course, some of you will recognize the fact I was inspired by this video:

« Last Edit: September 09, 2017, 02:28:55 am by Juju »


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Offline JWinslow23

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Re: The Walrii Prime
« Reply #1 on: September 09, 2017, 01:58:35 am »
I didn't think you'd actually do it! Or that it'd be so "clean" once someone found it (this is a literal perfect representation of the :walrii: , no extraneous or "wrong" digits).

Nice job, dude!

Offline kotu

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Re: The Walrii Prime
« Reply #2 on: September 09, 2017, 02:03:31 am »
nice code
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Offline Juju

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Re: The Walrii Prime
« Reply #3 on: September 09, 2017, 02:06:06 am »
Yeah, I'm kinda surprised I'd even find something. Actually, the last 3 digits are wrong, but of all the combinations of white and black pixels I tried, this was the only one that fits with the rest with no random digits.
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Offline kotu

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Re: The Walrii Prime
« Reply #4 on: September 09, 2017, 02:07:28 am »
We still believe it's a prime

Thanks juju
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Offline _iPhoenix_

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Re: The Walrii Prime
« Reply #5 on: September 09, 2017, 02:16:02 pm »
Dammit.

My [crappy, written in like 5 min to brute force the hell out of this problem] C code is still running. (It's been like 2 days, too)

I guess I'll let it keep running and see if it comes up with anything different.
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