Other Primes - Page 16

pepi37 · 2019-02-15, 06:58

Serge, I will hang myself to the first tree :)
Two primes, again you are convincingly leading in this class: but as I know you and Propper you will not stop here....

But on the other hand, I cannot beat those computer resources Propper have, so I must reconcile with destiny , and I must know what is my limits :))

Congratulations!

paulunderwood · 2019-02-15, 16:53

Quote:

Originally Posted by Batalov

But wait...!

99*10^1536527-1 is prime!

Congrats Serge and Ryan for this second Near-redigit prime.

Dr Sardonicus · 2019-02-15, 17:51

Congratulations!

Quote:

Originally Posted by Batalov

But wait...!

Oh, goody! This is way better than the "there's more!" promised in ~~scammercials~~ infomercials.

I did notice something weird on the page showing the first of the two newly-discovered megaprimes:

Quote:

Running N+1 test using discriminant 3,

But-but-but--- 3 isn't a discriminant! Stickelberger's criterion for the discriminant, you know. The discriminant for Q(sqrt(3))/Q is 12.

paulunderwood · 2019-02-22, 16:13

Serge and Ryan do it again:

993*10^1768283 - 1

Dr Sardonicus · 2019-02-22, 18:39

Quote:

Originally Posted by paulunderwood

Serge and Ryan do it again:

993*10^1768283 - 1

Verification still "InProcess," but I'm sure that's merely a formality, so congratulations in advance!

pepi37 · 2019-02-22, 19:17

Quote:

Originally Posted by paulunderwood

Serge and Ryan do it again:

993*10^1768283 - 1

I will always be second on third or 15 on the list :)

last time they go together they stopped at 5.2 M digits :))

But in any way, congratulations!

LaurV · 2019-02-23, 02:31

Nice job!
Congrats

Batalov · 2019-02-26, 00:50

Speaking of other primes - Peter Kaiser's latest Quad is out there in outer space!
https://primes.utm.edu/top20/page.php?id=55

10,132 digits!

This quad has a remarkably high difficulty level! Congratulations to Peter!

Puzzle-Peter · 2019-02-26, 13:33

Thanks!
I am still trying to decide what to go for next. So many ideas but they are all probably too hard...

Batalov · 2019-02-26, 19:08

Every section of the specialized Top 20s is interesting in its own way. Breaks the monotony!

Try maybe Irregular primes (both kinds)*, ...maybe Generalized Lucas primitive part, maybe something else? They all need different attacks. All are interesting in their own way.
Well, except some categories :-) Some are just - "plan for a certain number of hours, and you will be done with the next sequence member". For example partition numbers. I am pretty sure that these could be in and out. I found an interesting twist for myself there trying to find a large prime partitions(n^2), and I did; there are no easy others. Maybe someone can find a large prime partitions(n^3)? (though I have probably already tried. I don't remember off the top of my head).

____________________
*That would be a lot of ECM; with a specific challenge: it is not documented anywhere how far others already ECMd. These are rather very refractory to attempts, in my experience.

paulunderwood · 2019-02-26, 19:47

The Fibonacci PRPs U(130021) and U(148091) are ripe for a multi-core Primo proof. Alternatively, there are some smaller Mersenne co-factors that need proofs.

Congrats for your latest quadruplet.

2019-02-22, 16:13	#169
paulunderwood Sep 2002 Database er0rr 2·3²·11·19 Posts	Serge and Ryan do it again: 99310^1768283 - 1 Last fiddled with by paulunderwood on 2019-02-22 at 16:13*

2019-02-26, 19:47	#176
paulunderwood Sep 2002 Database er0rr 2×3²×11×19 Posts	The Fibonacci PRPs U(130021) and U(148091) are ripe for a multi-core Primo proof. Alternatively, there are some smaller Mersenne co-factors that need proofs. Congrats for your latest quadruplet. Last fiddled with by paulunderwood on 2019-02-26 at 19:58

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2019-02-15, 06:58	#166
pepi37 Dec 2011 After milion nines:) 1,451 Posts	Serge, I will hang myself to the first tree :) Two primes, again you are convincingly leading in this class: but as I know you and Propper you will not stop here.... But on the other hand, I cannot beat those computer resources Propper have, so I must reconcile with destiny , and I must know what is my limits :)) Congratulations!

2019-02-23, 02:31	#172
LaurV Romulan Interpreter Jun 2011 Thailand 3²·29·37 Posts	Nice job! Congrats

2019-02-26, 00:50	#173
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 2·47·101 Posts	Speaking of other primes - Peter Kaiser's latest Quad is out there in outer space! https://primes.utm.edu/top20/page.php?id=55 10,132 digits! This quad has a remarkably high difficulty level! Congratulations to Peter!

2019-02-26, 13:33	#174
Puzzle-Peter Jun 2009 2²·3²·19 Posts	Thanks! I am still trying to decide what to go for next. So many ideas but they are all probably too hard...

2019-02-26, 19:08	#175
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 2·47·101 Posts	Every section of the specialized Top 20s is interesting in its own way. Breaks the monotony! Try maybe Irregular primes (both kinds), ...maybe Generalized Lucas primitive part, maybe something else? They all need different attacks. All are interesting in their own way. Well, except some categories :-) Some are just - "plan for a certain number of hours, and you will be done with the next sequence member". For example partition numbers. I am pretty sure that these could be in and out. I found an interesting twist for myself there trying to find a large prime partitions(n^2), and I did; there are no easy others. Maybe someone can find a large prime partitions(n^3)? (though I have probably already tried. I don't remember off the top of my head). ____________________ That would be a lot of ECM; with a specific challenge: it is not documented anywhere how far others already ECMd. These are rather very refractory to attempts, in my experience.