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Forum: Data 2021-05-01, 22:45
Replies: 3,384
Views: 268,987
Posted By rudy235
MEGAPRIMES

There is a new milestone of sorts today May Day 2021

There are now 1006 mega primes in the Prime List at utm.edu

Five years ago there were only 169, meaning that 5/6 of these mega primes have...
Forum: And now for something completely different 2021-04-27, 00:29
Replies: 7
Views: 259
Posted By rudy235
Ok Serge. Thanks So for 2 k= 1 What are...

Ok Serge. Thanks
So for 2 k= 1

What are then the values of k for 3, 4, 5, 6, 7, 10
Forum: And now for something completely different 2021-04-26, 13:34
Replies: 7
Views: 259
Posted By rudy235
I fully understand the reasons behind the paucity...

I fully understand the reasons behind the paucity of prime repunits to bases that are perfect powers.

What I would love to understand is how to extend the Lenstra–Pomerance–Wagstaff conjecture to...
Forum: And now for something completely different 2021-04-26, 10:49
Replies: 7
Views: 259
Posted By rudy235
Slight correction:

Slight correction:
Forum: And now for something completely different 2021-04-26, 04:39
Replies: 7
Views: 259
Posted By rudy235
Frequency of REPUNIT primes

Frequency of REPUNITS

Generalized repunits are [$]{a^n-1} \over {a-1}[/$]

Thus if a =2 we have the Mersenne Numbers The Mersenne Exponent primes are 2, 3, 5, 7, 13, 17, 19, 31, 61, 89........
Forum: And now for something completely different 2021-04-22, 18:53
Replies: 55
Views: 2,480
Posted By rudy235
That is so cool! How are you going about...

That is so cool! How are you going about it?:spinner:
Forum: And now for something completely different 2021-04-22, 18:41
Replies: 55
Views: 2,480
Posted By rudy235
Sergei and Ryan: Congratulations to both of you!...

Sergei and Ryan: Congratulations to both of you! This is an incredible achievement!
:party:

We now have 4 proven repunits and 5 PRP

This one took almost 14 years to come to light.

I can...
Forum: Lounge 2021-04-09, 18:14
Replies: 1,722
RIP
Views: 156,081
Posted By rudy235
There is no direct number +44 303 123 7300 is the...

There is no direct number +44 303 123 7300 is the Buckingham palace exchange and they patch through to wherever Her Majesty is even if she is sailing in the Royal Yacht.

I've already spoken to Her...
Forum: Lounge 2021-04-09, 14:15
Replies: 1,722
RIP
Views: 156,081
Posted By rudy235
Hello Carlos that link goes to a source that...

Hello Carlos that link goes to a source that requires a subscription.

Perhaps another link?
Forum: Lounge 2021-03-11, 01:38
Replies: 43
Views: 2,995
Posted By rudy235
Ticlio 4818 mts.24471

Ticlio 4818 mts.24471
Forum: Languages -- Ancient & Modern, Human & Machine 2021-01-31, 11:28
Replies: 34
Views: 3,198
Posted By rudy235
ONCE

In English once is only one time.

In Spanish "once" is eleven times more than "once".
Forum: And now for something completely different 2021-01-31, 09:30
Replies: 9
Views: 850
Posted By rudy235
12 12 2121 @12:21 GMT (I meant Titanic 24-tuplet)

12 12 2121 @12:21 GMT (I meant Titanic 24-tuplet)
Forum: And now for something completely different 2021-01-31, 09:26
Replies: 9
Views: 850
Posted By rudy235
The description given By Sergei is very concise. ...

The description given By Sergei is very concise. Why don't you present it to UTM with that description?

Ahh! Congratulations BTW.
Forum: Lounge 2020-12-28, 19:17
Replies: 1,722
RIP
Views: 156,081
Posted By rudy235
ARMANDO MANZANERO LEGENDARY Mexican singer and...

ARMANDO MANZANERO LEGENDARY Mexican singer and composer (https://www.cnn.com/2020/12/28/entertainment/armando-manzanero-death-scli-intl/index.html).
Forum: Lounge 2020-12-13, 23:07
Replies: 1,722
RIP
Views: 156,081
Posted By rudy235
https://thehill.com/blogs/in-the-know/in-the-know/...

https://thehill.com/blogs/in-the-know/in-the-know/530037-legendary-spy-novelist-john-le-carre-dead-at-89

Yup, you beat me to the punch!!
Forum: Lounge 2020-12-03, 06:48
Replies: 1,722
RIP
Views: 156,081
Posted By rudy235
COVID-19

COVID-19
Forum: Science & Technology 2020-11-24, 16:17
Replies: 70
Views: 6,604
Posted By rudy235
305 metres aka 1000 feet.

305 metres aka 1000 feet.
Forum: Science & Technology 2020-11-24, 13:42
Replies: 70
Views: 6,604
Posted By rudy235
Found this. Arecibo observatory supporters ask...

Found this.
Arecibo observatory supporters ask White House to help save damaged radio telescope


https://www.space.com/arecibo-observatory-supporters-petitioning-white-house
Forum: Science & Technology 2020-11-23, 21:09
Replies: 70
Views: 6,604
Posted By rudy235
I do not see a way this could be repaired. They...

I do not see a way this could be repaired. They dropped the ball (no pun intended) when on August 10 the first cable snapped.

I hate to engage in political opinion but the current administration...
Forum: Science & Technology 2020-11-23, 04:57
Replies: 70
Views: 6,604
Posted By rudy235
How many of this forum have actually visited the...

How many of this forum have actually visited the Arecibo Radio Telescope?
I was there in November 2013.
Forum: Data 2020-10-24, 23:17
Replies: 3,384
Views: 268,987
Posted By rudy235
Primes with more than 2 million digits

Today we reached a milestone of sorts with the 97th and 100th primes that have more than 2 million digits.


39×26648997+1 100th. 2'001,550 digits

39x26684941+1 . 97th. 2'013,370...
Forum: sweety439 2020-10-01, 17:10
Replies: 10
836
Views: 1,743
Posted By rudy235
Forgive me if i'm wrong. isn't it that 22,...

Forgive me if i'm wrong.

isn't it that 22, 33, 44... 99 are 2-digit palindromic numbers?

And what about 1001, 1111, 1221, 1331... 9889, 9999. Aren't those 4 digit palindromic numbers?
Forum: Computer Science & Computational Number Theory 2020-08-31, 03:01
Replies: 34
Views: 23,634
Posted By rudy235
Well, I must say it is impressive. ...

Well, I must say it is impressive.

Congratulations to both of you.:smile::lavalamp:
Forum: Lounge 2020-08-27, 09:04
Replies: 48
Views: 14,310
Posted By rudy235
Took about 15 min to figure the geometry. ...

Took about 15 min to figure the geometry. (asuming water temperture at 0.1ºC (32.2ºF) and air pressure about 4.6 Torr) :smile:
and then 5 mins to do the math. it comes to Sqrt(15)*4 + Sqrt(2)*2=...
Forum: Riesel Prime Search 2020-08-02, 17:36
Replies: 243
Views: 41,847
Posted By rudy235
Well, 101 happens to be prime.

Well, 101 happens to be prime.
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